81383960

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{290657}}^1$

素因数の和:290675

約数の個数: 32

約数和(自身を含む): 209273760

約数和(自身を除く): 127889800

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 290657, 581314, 1162628, 1453285, 2034599, 2325256, 2906570, 4069198, 5813140, 8138396, 10172995, 11626280, 16276792, 20345990, 40691980, 81383960]

約数ペア:

[(1, 81383960), (2, 40691980), (4, 20345990), (5, 16276792), (7, 11626280), (8, 10172995), (10, 8138396), (14, 5813140), (20, 4069198), (28, 2906570), (35, 2325256), (40, 2034599), (56, 1453285), (70, 1162628), (140, 581314), (280, 290657)]