21200440

素因数分解:

$2^3\times 5^1\times {\mathrm{79}}^1\times {\mathrm{6709}}^1$

素因数の和:6799

約数の個数: 32

約数和(自身を含む): 48312000

約数和(自身を除く): 27111560

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 79, 158, 316, 395, 632, 790, 1580, 3160, 6709, 13418, 26836, 33545, 53672, 67090, 134180, 268360, 530011, 1060022, 2120044, 2650055, 4240088, 5300110, 10600220, 21200440]

約数ペア:

[(1, 21200440), (2, 10600220), (4, 5300110), (5, 4240088), (8, 2650055), (10, 2120044), (20, 1060022), (40, 530011), (79, 268360), (158, 134180), (316, 67090), (395, 53672), (632, 33545), (790, 26836), (1580, 13418), (3160, 6709)]