21506940

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{13}}^2\times {\mathrm{101}}^1$

素因数の和:149

約数の個数: 216

約数和(自身を含む): 81533088

約数和(自身を除く): 60026148

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 13, 14, 15, 18, 20, 21, 26, 28, 30, 35, 36, 39, 42, 45, 52, 60, 63, 65, 70, 78, 84, 90, 91, 101, 105, 117, 126, 130, 140, 156, 169, 180, 182, 195, 202, 210, 234, 252, 260, 273, 303, 315, 338, 364, 390, 404, 420, 455, 468, 505, 507, 546, 585, 606, 630, 676, 707, 780, 819, 845, 909, 910, 1010, 1014, 1092, 1170, 1183, 1212, 1260, 1313, 1365, 1414, 1515, 1521, 1638, 1690, 1818, 1820, 2020, 2028, 2121, 2340, 2366, 2535, 2626, 2730, 2828, 3030, 3042, 3276, 3380, 3535, 3549, 3636, 3939, 4095, 4242, 4545, 4732, 5070, 5252, 5460, 5915, 6060, 6084, 6363, 6565, 7070, 7098, 7605, 7878, 8190, 8484, 9090, 9191, 10140, 10605, 10647, 11817, 11830, 12726, 13130, 14140, 14196, 15210, 15756, 16380, 17069, 17745, 18180, 18382, 19695, 21210, 21294, 23634, 23660, 25452, 26260, 27573, 30420, 31815, 34138, 35490, 36764, 39390, 42420, 42588, 45955, 47268, 51207, 53235, 55146, 59085, 63630, 68276, 70980, 78780, 82719, 85345, 91910, 102414, 106470, 110292, 118170, 119483, 127260, 137865, 153621, 165438, 170690, 183820, 204828, 212940, 236340, 238966, 256035, 275730, 307242, 330876, 341380, 358449, 413595, 477932, 512070, 551460, 597415, 614484, 716898, 768105, 827190, 1024140, 1075347, 1194830, 1433796, 1536210, 1654380, 1792245, 2150694, 2389660, 3072420, 3584490, 4301388, 5376735, 7168980, 10753470, 21506940]

約数ペア:

[(1, 21506940), (2, 10753470), (3, 7168980), (4, 5376735), (5, 4301388), (6, 3584490), (7, 3072420), (9, 2389660), (10, 2150694), (12, 1792245), (13, 1654380), (14, 1536210), (15, 1433796), (18, 1194830), (20, 1075347), (21, 1024140), (26, 827190), (28, 768105), (30, 716898), (35, 614484), (36, 597415), (39, 551460), (42, 512070), (45, 477932), (52, 413595), (60, 358449), (63, 341380), (65, 330876), (70, 307242), (78, 275730), (84, 256035), (90, 238966), (91, 236340), (101, 212940), (105, 204828), (117, 183820), (126, 170690), (130, 165438), (140, 153621), (156, 137865), (169, 127260), (180, 119483), (182, 118170), (195, 110292), (202, 106470), (210, 102414), (234, 91910), (252, 85345), (260, 82719), (273, 78780), (303, 70980), (315, 68276), (338, 63630), (364, 59085), (390, 55146), (404, 53235), (420, 51207), (455, 47268), (468, 45955), (505, 42588), (507, 42420), (546, 39390), (585, 36764), (606, 35490), (630, 34138), (676, 31815), (707, 30420), (780, 27573), (819, 26260), (845, 25452), (909, 23660), (910, 23634), (1010, 21294), (1014, 21210), (1092, 19695), (1170, 18382), (1183, 18180), (1212, 17745), (1260, 17069), (1313, 16380), (1365, 15756), (1414, 15210), (1515, 14196), (1521, 14140), (1638, 13130), (1690, 12726), (1818, 11830), (1820, 11817), (2020, 10647), (2028, 10605), (2121, 10140), (2340, 9191), (2366, 9090), (2535, 8484), (2626, 8190), (2730, 7878), (2828, 7605), (3030, 7098), (3042, 7070), (3276, 6565), (3380, 6363), (3535, 6084), (3549, 6060), (3636, 5915), (3939, 5460), (4095, 5252), (4242, 5070), (4545, 4732)]