21157360

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{37781}}^1$

素因数の和:37801

約数の個数: 40

約数和(自身を含む): 56219616

約数和(自身を除く): 35062256

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 280, 560, 37781, 75562, 151124, 188905, 264467, 302248, 377810, 528934, 604496, 755620, 1057868, 1322335, 1511240, 2115736, 2644670, 3022480, 4231472, 5289340, 10578680, 21157360]

約数ペア:

[(1, 21157360), (2, 10578680), (4, 5289340), (5, 4231472), (7, 3022480), (8, 2644670), (10, 2115736), (14, 1511240), (16, 1322335), (20, 1057868), (28, 755620), (35, 604496), (40, 528934), (56, 377810), (70, 302248), (80, 264467), (112, 188905), (140, 151124), (280, 75562), (560, 37781)]