20499830

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{2221}}^1$

素因数の和:2312

約数の個数: 32

約数和(自身を含む): 40315968

約数和(自身を除く): 19816138

約数列:

[1, 2, 5, 10, 13, 26, 65, 71, 130, 142, 355, 710, 923, 1846, 2221, 4442, 4615, 9230, 11105, 22210, 28873, 57746, 144365, 157691, 288730, 315382, 788455, 1576910, 2049983, 4099966, 10249915, 20499830]

約数ペア:

[(1, 20499830), (2, 10249915), (5, 4099966), (10, 2049983), (13, 1576910), (26, 788455), (65, 315382), (71, 288730), (130, 157691), (142, 144365), (355, 57746), (710, 28873), (923, 22210), (1846, 11105), (2221, 9230), (4442, 4615)]