81405320

素因数分解:

$2^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{70177}}^1$

素因数の和:70217

約数の個数: 32

約数和(自身を含む): 189480600

約数和(自身を除く): 108075280

約数列:

[1, 2, 4, 5, 8, 10, 20, 29, 40, 58, 116, 145, 232, 290, 580, 1160, 70177, 140354, 280708, 350885, 561416, 701770, 1403540, 2035133, 2807080, 4070266, 8140532, 10175665, 16281064, 20351330, 40702660, 81405320]

約数ペア:

[(1, 81405320), (2, 40702660), (4, 20351330), (5, 16281064), (8, 10175665), (10, 8140532), (20, 4070266), (29, 2807080), (40, 2035133), (58, 1403540), (116, 701770), (145, 561416), (232, 350885), (290, 280708), (580, 140354), (1160, 70177)]