21210540

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{383}}^1$

素因数の和:479

約数の個数: 96

約数和(自身を含む): 65028096

約数和(自身を除く): 43817556

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 71, 78, 130, 142, 156, 195, 213, 260, 284, 355, 383, 390, 426, 710, 766, 780, 852, 923, 1065, 1149, 1420, 1532, 1846, 1915, 2130, 2298, 2769, 3692, 3830, 4260, 4596, 4615, 4979, 5538, 5745, 7660, 9230, 9958, 11076, 11490, 13845, 14937, 18460, 19916, 22980, 24895, 27193, 27690, 29874, 49790, 54386, 55380, 59748, 74685, 81579, 99580, 108772, 135965, 149370, 163158, 271930, 298740, 326316, 353509, 407895, 543860, 707018, 815790, 1060527, 1414036, 1631580, 1767545, 2121054, 3535090, 4242108, 5302635, 7070180, 10605270, 21210540]

約数ペア:

[(1, 21210540), (2, 10605270), (3, 7070180), (4, 5302635), (5, 4242108), (6, 3535090), (10, 2121054), (12, 1767545), (13, 1631580), (15, 1414036), (20, 1060527), (26, 815790), (30, 707018), (39, 543860), (52, 407895), (60, 353509), (65, 326316), (71, 298740), (78, 271930), (130, 163158), (142, 149370), (156, 135965), (195, 108772), (213, 99580), (260, 81579), (284, 74685), (355, 59748), (383, 55380), (390, 54386), (426, 49790), (710, 29874), (766, 27690), (780, 27193), (852, 24895), (923, 22980), (1065, 19916), (1149, 18460), (1420, 14937), (1532, 13845), (1846, 11490), (1915, 11076), (2130, 9958), (2298, 9230), (2769, 7660), (3692, 5745), (3830, 5538), (4260, 4979), (4596, 4615)]