20921090

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{149}}^1\times {\mathrm{739}}^1$

素因数の和:914

約数の個数: 32

約数和(自身を含む): 39960000

約数和(自身を除く): 19038910

約数列:

[1, 2, 5, 10, 19, 38, 95, 149, 190, 298, 739, 745, 1478, 1490, 2831, 3695, 5662, 7390, 14041, 14155, 28082, 28310, 70205, 110111, 140410, 220222, 550555, 1101110, 2092109, 4184218, 10460545, 20921090]

約数ペア:

[(1, 20921090), (2, 10460545), (5, 4184218), (10, 2092109), (19, 1101110), (38, 550555), (95, 220222), (149, 140410), (190, 110111), (298, 70205), (739, 28310), (745, 28082), (1478, 14155), (1490, 14041), (2831, 7390), (3695, 5662)]