21080380

素因数分解:

$2^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{61}}^1\times {\mathrm{467}}^1$

素因数の和:574

約数の個数: 48

約数和(自身を含む): 46309536

約数和(自身を除く): 25229156

約数列:

[1, 2, 4, 5, 10, 20, 37, 61, 74, 122, 148, 185, 244, 305, 370, 467, 610, 740, 934, 1220, 1868, 2257, 2335, 4514, 4670, 9028, 9340, 11285, 17279, 22570, 28487, 34558, 45140, 56974, 69116, 86395, 113948, 142435, 172790, 284870, 345580, 569740, 1054019, 2108038, 4216076, 5270095, 10540190, 21080380]

約数ペア:

[(1, 21080380), (2, 10540190), (4, 5270095), (5, 4216076), (10, 2108038), (20, 1054019), (37, 569740), (61, 345580), (74, 284870), (122, 172790), (148, 142435), (185, 113948), (244, 86395), (305, 69116), (370, 56974), (467, 45140), (610, 34558), (740, 28487), (934, 22570), (1220, 17279), (1868, 11285), (2257, 9340), (2335, 9028), (4514, 4670)]