20502800

素因数分解:

$2^4\times 5^2\times {\mathrm{51257}}^1$

素因数の和:51275

約数の個数: 30

約数和(自身を含む): 49258938

約数和(自身を除く): 28756138

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 51257, 102514, 205028, 256285, 410056, 512570, 820112, 1025140, 1281425, 2050280, 2562850, 4100560, 5125700, 10251400, 20502800]

約数ペア:

[(1, 20502800), (2, 10251400), (4, 5125700), (5, 4100560), (8, 2562850), (10, 2050280), (16, 1281425), (20, 1025140), (25, 820112), (40, 512570), (50, 410056), (80, 256285), (100, 205028), (200, 102514), (400, 51257)]