217001240

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{139}}^1\times {\mathrm{1259}}^1$

素因数の和:1440

約数の個数: 64

約数和(自身を含む): 508032000

約数和(自身を除く): 291030760

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 139, 155, 248, 278, 310, 556, 620, 695, 1112, 1240, 1259, 1390, 2518, 2780, 4309, 5036, 5560, 6295, 8618, 10072, 12590, 17236, 21545, 25180, 34472, 39029, 43090, 50360, 78058, 86180, 156116, 172360, 175001, 195145, 312232, 350002, 390290, 700004, 780580, 875005, 1400008, 1561160, 1750010, 3500020, 5425031, 7000040, 10850062, 21700124, 27125155, 43400248, 54250310, 108500620, 217001240]

約数ペア:

[(1, 217001240), (2, 108500620), (4, 54250310), (5, 43400248), (8, 27125155), (10, 21700124), (20, 10850062), (31, 7000040), (40, 5425031), (62, 3500020), (124, 1750010), (139, 1561160), (155, 1400008), (248, 875005), (278, 780580), (310, 700004), (556, 390290), (620, 350002), (695, 312232), (1112, 195145), (1240, 175001), (1259, 172360), (1390, 156116), (2518, 86180), (2780, 78058), (4309, 50360), (5036, 43090), (5560, 39029), (6295, 34472), (8618, 25180), (10072, 21545), (12590, 17236)]