21117520

素因数分解:

$2^4\times 5^1\times {\mathrm{107}}^1\times {\mathrm{2467}}^1$

素因数の和:2587

約数の個数: 40

約数和(自身を含む): 49577184

約数和(自身を除く): 28459664

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 107, 214, 428, 535, 856, 1070, 1712, 2140, 2467, 4280, 4934, 8560, 9868, 12335, 19736, 24670, 39472, 49340, 98680, 197360, 263969, 527938, 1055876, 1319845, 2111752, 2639690, 4223504, 5279380, 10558760, 21117520]

約数ペア:

[(1, 21117520), (2, 10558760), (4, 5279380), (5, 4223504), (8, 2639690), (10, 2111752), (16, 1319845), (20, 1055876), (40, 527938), (80, 263969), (107, 197360), (214, 98680), (428, 49340), (535, 39472), (856, 24670), (1070, 19736), (1712, 12335), (2140, 9868), (2467, 8560), (4280, 4934)]