21350240

素因数分解:

$2^5\times 5^1\times {\mathrm{133439}}^1$

素因数の和:133454

約数の個数: 24

約数和(自身を含む): 50440320

約数和(自身を除く): 29090080

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 133439, 266878, 533756, 667195, 1067512, 1334390, 2135024, 2668780, 4270048, 5337560, 10675120, 21350240]

約数ペア:

[(1, 21350240), (2, 10675120), (4, 5337560), (5, 4270048), (8, 2668780), (10, 2135024), (16, 1334390), (20, 1067512), (32, 667195), (40, 533756), (80, 266878), (160, 133439)]