87039980

素因数分解:

$2^2\times 5^1\times {\mathrm{1091}}^1\times {\mathrm{3989}}^1$

素因数の和:5089

約数の個数: 24

約数和(自身を含む): 182997360

約数和(自身を除く): 95957380

約数列:

[1, 2, 4, 5, 10, 20, 1091, 2182, 3989, 4364, 5455, 7978, 10910, 15956, 19945, 21820, 39890, 79780, 4351999, 8703998, 17407996, 21759995, 43519990, 87039980]

約数ペア:

[(1, 87039980), (2, 43519990), (4, 21759995), (5, 17407996), (10, 8703998), (20, 4351999), (1091, 79780), (2182, 39890), (3989, 21820), (4364, 19945), (5455, 15956), (7978, 10910)]