8981980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{64157}}^1$

素因数の和:64173

約数の個数: 24

約数和(自身を含む): 21557088

約数和(自身を除く): 12575108

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 64157, 128314, 256628, 320785, 449099, 641570, 898198, 1283140, 1796396, 2245495, 4490990, 8981980]

約数ペア:

[(1, 8981980), (2, 4490990), (4, 2245495), (5, 1796396), (7, 1283140), (10, 898198), (14, 641570), (20, 449099), (28, 320785), (35, 256628), (70, 128314), (140, 64157)]