20442920

素因数分解:

$2^3\times 5^1\times {\mathrm{73}}^1\times {\mathrm{7001}}^1$

素因数の和:7085

約数の個数: 32

約数和(自身を含む): 46633320

約数和(自身を除く): 26190400

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 73, 146, 292, 365, 584, 730, 1460, 2920, 7001, 14002, 28004, 35005, 56008, 70010, 140020, 280040, 511073, 1022146, 2044292, 2555365, 4088584, 5110730, 10221460, 20442920]

約数ペア:

[(1, 20442920), (2, 10221460), (4, 5110730), (5, 4088584), (8, 2555365), (10, 2044292), (20, 1022146), (40, 511073), (73, 280040), (146, 140020), (292, 70010), (365, 56008), (584, 35005), (730, 28004), (1460, 14002), (2920, 7001)]