71980

素因数分解:

$2^2\times 5^1\times {\mathrm{59}}^1\times {\mathrm{61}}^1$

素因数の和:129

約数の個数: 24

約数和(自身を含む): 156240

約数和(自身を除く): 84260

約数列:

[1, 2, 4, 5, 10, 20, 59, 61, 118, 122, 236, 244, 295, 305, 590, 610, 1180, 1220, 3599, 7198, 14396, 17995, 35990, 71980]

約数ペア:

[(1, 71980), (2, 35990), (4, 17995), (5, 14396), (10, 7198), (20, 3599), (59, 1220), (61, 1180), (118, 610), (122, 590), (236, 305), (244, 295)]