20481940

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{107}}^1\times {\mathrm{563}}^1$

素因数の和:696

約数の個数: 48

約数和(自身を含む): 46049472

約数和(自身を除く): 25567532

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 107, 170, 214, 340, 428, 535, 563, 1070, 1126, 1819, 2140, 2252, 2815, 3638, 5630, 7276, 9095, 9571, 11260, 18190, 19142, 36380, 38284, 47855, 60241, 95710, 120482, 191420, 240964, 301205, 602410, 1024097, 1204820, 2048194, 4096388, 5120485, 10240970, 20481940]

約数ペア:

[(1, 20481940), (2, 10240970), (4, 5120485), (5, 4096388), (10, 2048194), (17, 1204820), (20, 1024097), (34, 602410), (68, 301205), (85, 240964), (107, 191420), (170, 120482), (214, 95710), (340, 60241), (428, 47855), (535, 38284), (563, 36380), (1070, 19142), (1126, 18190), (1819, 11260), (2140, 9571), (2252, 9095), (2815, 7276), (3638, 5630)]