217770920

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{126611}}^1$

素因数の和:126665

約数の個数: 32

約数和(自身を含む): 501383520

約数和(自身を除く): 283612600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1720, 126611, 253222, 506444, 633055, 1012888, 1266110, 2532220, 5064440, 5444273, 10888546, 21777092, 27221365, 43554184, 54442730, 108885460, 217770920]

約数ペア:

[(1, 217770920), (2, 108885460), (4, 54442730), (5, 43554184), (8, 27221365), (10, 21777092), (20, 10888546), (40, 5444273), (43, 5064440), (86, 2532220), (172, 1266110), (215, 1012888), (344, 633055), (430, 506444), (860, 253222), (1720, 126611)]