39171980

素因数分解:

$2^2\times 5^1\times {\mathrm{491}}^1\times {\mathrm{3989}}^1$

素因数の和:4489

約数の個数: 24

約数和(自身を含む): 82449360

約数和(自身を除く): 43277380

約数列:

[1, 2, 4, 5, 10, 20, 491, 982, 1964, 2455, 3989, 4910, 7978, 9820, 15956, 19945, 39890, 79780, 1958599, 3917198, 7834396, 9792995, 19585990, 39171980]

約数ペア:

[(1, 39171980), (2, 19585990), (4, 9792995), (5, 7834396), (10, 3917198), (20, 1958599), (491, 79780), (982, 39890), (1964, 19945), (2455, 15956), (3989, 9820), (4910, 7978)]