123780520

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{99823}}^1$

素因数の和:99865

約数の個数: 32

約数和(自身を含む): 287493120

約数和(自身を除く): 163712600

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 248, 310, 620, 1240, 99823, 199646, 399292, 499115, 798584, 998230, 1996460, 3094513, 3992920, 6189026, 12378052, 15472565, 24756104, 30945130, 61890260, 123780520]

約数ペア:

[(1, 123780520), (2, 61890260), (4, 30945130), (5, 24756104), (8, 15472565), (10, 12378052), (20, 6189026), (31, 3992920), (40, 3094513), (62, 1996460), (124, 998230), (155, 798584), (248, 499115), (310, 399292), (620, 199646), (1240, 99823)]