19687640

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{70313}}^1$

素因数の和:70331

約数の個数: 32

約数和(自身を含む): 50626080

約数和(自身を除く): 30938440

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 70313, 140626, 281252, 351565, 492191, 562504, 703130, 984382, 1406260, 1968764, 2460955, 2812520, 3937528, 4921910, 9843820, 19687640]

約数ペア:

[(1, 19687640), (2, 9843820), (4, 4921910), (5, 3937528), (7, 2812520), (8, 2460955), (10, 1968764), (14, 1406260), (20, 984382), (28, 703130), (35, 562504), (40, 492191), (56, 351565), (70, 281252), (140, 140626), (280, 70313)]