20571440

素因数分解:

$2^4\times 5^1\times {\mathrm{29}}^1\times {\mathrm{8867}}^1$

素因数の和:8909

約数の個数: 40

約数和(自身を含む): 49483440

約数和(自身を除く): 28912000

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 29, 40, 58, 80, 116, 145, 232, 290, 464, 580, 1160, 2320, 8867, 17734, 35468, 44335, 70936, 88670, 141872, 177340, 257143, 354680, 514286, 709360, 1028572, 1285715, 2057144, 2571430, 4114288, 5142860, 10285720, 20571440]

約数ペア:

[(1, 20571440), (2, 10285720), (4, 5142860), (5, 4114288), (8, 2571430), (10, 2057144), (16, 1285715), (20, 1028572), (29, 709360), (40, 514286), (58, 354680), (80, 257143), (116, 177340), (145, 141872), (232, 88670), (290, 70936), (464, 44335), (580, 35468), (1160, 17734), (2320, 8867)]