81984560

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{281}}^1\times {\mathrm{521}}^1$

素因数の和:822

約数の個数: 80

約数和(自身を含む): 219039552

約数和(自身を除く): 137054992

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 280, 281, 521, 560, 562, 1042, 1124, 1405, 1967, 2084, 2248, 2605, 2810, 3647, 3934, 4168, 4496, 5210, 5620, 7294, 7868, 8336, 9835, 10420, 11240, 14588, 15736, 18235, 19670, 20840, 22480, 29176, 31472, 36470, 39340, 41680, 58352, 72940, 78680, 145880, 146401, 157360, 291760, 292802, 585604, 732005, 1024807, 1171208, 1464010, 2049614, 2342416, 2928020, 4099228, 5124035, 5856040, 8198456, 10248070, 11712080, 16396912, 20496140, 40992280, 81984560]

約数ペア:

[(1, 81984560), (2, 40992280), (4, 20496140), (5, 16396912), (7, 11712080), (8, 10248070), (10, 8198456), (14, 5856040), (16, 5124035), (20, 4099228), (28, 2928020), (35, 2342416), (40, 2049614), (56, 1464010), (70, 1171208), (80, 1024807), (112, 732005), (140, 585604), (280, 292802), (281, 291760), (521, 157360), (560, 146401), (562, 145880), (1042, 78680), (1124, 72940), (1405, 58352), (1967, 41680), (2084, 39340), (2248, 36470), (2605, 31472), (2810, 29176), (3647, 22480), (3934, 20840), (4168, 19670), (4496, 18235), (5210, 15736), (5620, 14588), (7294, 11240), (7868, 10420), (8336, 9835)]