21965012

素因数分解:

$2^2\times {\mathrm{41}}^1\times {\mathrm{67}}^1\times {\mathrm{1999}}^1$

素因数の和:2111

約数の個数: 24

約数和(自身を含む): 39984000

約数和(自身を除く): 18018988

約数列:

[1, 2, 4, 41, 67, 82, 134, 164, 268, 1999, 2747, 3998, 5494, 7996, 10988, 81959, 133933, 163918, 267866, 327836, 535732, 5491253, 10982506, 21965012]

約数ペア:

[(1, 21965012), (2, 10982506), (4, 5491253), (41, 535732), (67, 327836), (82, 267866), (134, 163918), (164, 133933), (268, 81959), (1999, 10988), (2747, 7996), (3998, 5494)]