211320920

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{122861}}^1$

素因数の和:122915

約数の個数: 32

約数和(自身を含む): 486533520

約数和(自身を除く): 275212600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1720, 122861, 245722, 491444, 614305, 982888, 1228610, 2457220, 4914440, 5283023, 10566046, 21132092, 26415115, 42264184, 52830230, 105660460, 211320920]

約数ペア:

[(1, 211320920), (2, 105660460), (4, 52830230), (5, 42264184), (8, 26415115), (10, 21132092), (20, 10566046), (40, 5283023), (43, 4914440), (86, 2457220), (172, 1228610), (215, 982888), (344, 614305), (430, 491444), (860, 245722), (1720, 122861)]