21621240

素因数分解:

$2^3\times 3^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{109}}^1$

素因数の和:174

約数の個数: 192

約数和(自身を含む): 77220000

約数和(自身を除く): 55598760

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 19, 20, 24, 29, 30, 36, 38, 40, 45, 57, 58, 60, 72, 76, 87, 90, 95, 109, 114, 116, 120, 145, 152, 171, 174, 180, 190, 218, 228, 232, 261, 285, 290, 327, 342, 348, 360, 380, 435, 436, 456, 522, 545, 551, 570, 580, 654, 684, 696, 760, 855, 870, 872, 981, 1044, 1090, 1102, 1140, 1160, 1305, 1308, 1368, 1635, 1653, 1710, 1740, 1962, 2071, 2088, 2180, 2204, 2280, 2610, 2616, 2755, 3161, 3270, 3306, 3420, 3480, 3924, 4142, 4360, 4408, 4905, 4959, 5220, 5510, 6213, 6322, 6540, 6612, 6840, 7848, 8265, 8284, 9483, 9810, 9918, 10355, 10440, 11020, 12426, 12644, 13080, 13224, 15805, 16530, 16568, 18639, 18966, 19620, 19836, 20710, 22040, 24795, 24852, 25288, 28449, 31065, 31610, 33060, 37278, 37932, 39240, 39672, 41420, 47415, 49590, 49704, 56898, 60059, 62130, 63220, 66120, 74556, 75864, 82840, 93195, 94830, 99180, 113796, 120118, 124260, 126440, 142245, 149112, 180177, 186390, 189660, 198360, 227592, 240236, 248520, 284490, 300295, 360354, 372780, 379320, 480472, 540531, 568980, 600590, 720708, 745560, 900885, 1081062, 1137960, 1201180, 1441416, 1801770, 2162124, 2402360, 2702655, 3603540, 4324248, 5405310, 7207080, 10810620, 21621240]

約数ペア:

[(1, 21621240), (2, 10810620), (3, 7207080), (4, 5405310), (5, 4324248), (6, 3603540), (8, 2702655), (9, 2402360), (10, 2162124), (12, 1801770), (15, 1441416), (18, 1201180), (19, 1137960), (20, 1081062), (24, 900885), (29, 745560), (30, 720708), (36, 600590), (38, 568980), (40, 540531), (45, 480472), (57, 379320), (58, 372780), (60, 360354), (72, 300295), (76, 284490), (87, 248520), (90, 240236), (95, 227592), (109, 198360), (114, 189660), (116, 186390), (120, 180177), (145, 149112), (152, 142245), (171, 126440), (174, 124260), (180, 120118), (190, 113796), (218, 99180), (228, 94830), (232, 93195), (261, 82840), (285, 75864), (290, 74556), (327, 66120), (342, 63220), (348, 62130), (360, 60059), (380, 56898), (435, 49704), (436, 49590), (456, 47415), (522, 41420), (545, 39672), (551, 39240), (570, 37932), (580, 37278), (654, 33060), (684, 31610), (696, 31065), (760, 28449), (855, 25288), (870, 24852), (872, 24795), (981, 22040), (1044, 20710), (1090, 19836), (1102, 19620), (1140, 18966), (1160, 18639), (1305, 16568), (1308, 16530), (1368, 15805), (1635, 13224), (1653, 13080), (1710, 12644), (1740, 12426), (1962, 11020), (2071, 10440), (2088, 10355), (2180, 9918), (2204, 9810), (2280, 9483), (2610, 8284), (2616, 8265), (2755, 7848), (3161, 6840), (3270, 6612), (3306, 6540), (3420, 6322), (3480, 6213), (3924, 5510), (4142, 5220), (4360, 4959), (4408, 4905)]