21243680

素因数分解:

$2^5\times 5^1\times {\mathrm{31}}^1\times {\mathrm{4283}}^1$

素因数の和:4329

約数の個数: 48

約数和(自身を含む): 51819264

約数和(自身を除く): 30575584

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 80, 124, 155, 160, 248, 310, 496, 620, 992, 1240, 2480, 4283, 4960, 8566, 17132, 21415, 34264, 42830, 68528, 85660, 132773, 137056, 171320, 265546, 342640, 531092, 663865, 685280, 1062184, 1327730, 2124368, 2655460, 4248736, 5310920, 10621840, 21243680]

約数ペア:

[(1, 21243680), (2, 10621840), (4, 5310920), (5, 4248736), (8, 2655460), (10, 2124368), (16, 1327730), (20, 1062184), (31, 685280), (32, 663865), (40, 531092), (62, 342640), (80, 265546), (124, 171320), (155, 137056), (160, 132773), (248, 85660), (310, 68528), (496, 42830), (620, 34264), (992, 21415), (1240, 17132), (2480, 8566), (4283, 4960)]