21287910

素因数分解:

$2^1\times 3^1\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{67}}^1\times {\mathrm{89}}^1$

素因数の和:190

約数の個数: 128

約数和(自身を含む): 63452160

約数和(自身を除く): 42164250

約数列:

[1, 2, 3, 5, 6, 7, 10, 14, 15, 17, 21, 30, 34, 35, 42, 51, 67, 70, 85, 89, 102, 105, 119, 134, 170, 178, 201, 210, 238, 255, 267, 335, 357, 402, 445, 469, 510, 534, 595, 623, 670, 714, 890, 938, 1005, 1139, 1190, 1246, 1335, 1407, 1513, 1785, 1869, 2010, 2278, 2345, 2670, 2814, 3026, 3115, 3417, 3570, 3738, 4539, 4690, 5695, 5963, 6230, 6834, 7035, 7565, 7973, 9078, 9345, 10591, 11390, 11926, 14070, 15130, 15946, 17085, 17889, 18690, 21182, 22695, 23919, 29815, 31773, 34170, 35778, 39865, 41741, 45390, 47838, 52955, 59630, 63546, 79730, 83482, 89445, 101371, 105910, 119595, 125223, 158865, 178890, 202742, 208705, 239190, 250446, 304113, 317730, 417410, 506855, 608226, 626115, 709597, 1013710, 1252230, 1419194, 1520565, 2128791, 3041130, 3547985, 4257582, 7095970, 10643955, 21287910]

約数ペア:

[(1, 21287910), (2, 10643955), (3, 7095970), (5, 4257582), (6, 3547985), (7, 3041130), (10, 2128791), (14, 1520565), (15, 1419194), (17, 1252230), (21, 1013710), (30, 709597), (34, 626115), (35, 608226), (42, 506855), (51, 417410), (67, 317730), (70, 304113), (85, 250446), (89, 239190), (102, 208705), (105, 202742), (119, 178890), (134, 158865), (170, 125223), (178, 119595), (201, 105910), (210, 101371), (238, 89445), (255, 83482), (267, 79730), (335, 63546), (357, 59630), (402, 52955), (445, 47838), (469, 45390), (510, 41741), (534, 39865), (595, 35778), (623, 34170), (670, 31773), (714, 29815), (890, 23919), (938, 22695), (1005, 21182), (1139, 18690), (1190, 17889), (1246, 17085), (1335, 15946), (1407, 15130), (1513, 14070), (1785, 11926), (1869, 11390), (2010, 10591), (2278, 9345), (2345, 9078), (2670, 7973), (2814, 7565), (3026, 7035), (3115, 6834), (3417, 6230), (3570, 5963), (3738, 5695), (4539, 4690)]