19881920

素因数分解:

$2^6\times 5^1\times {\mathrm{62131}}^1$

素因数の和:62148

約数の個数: 28

約数和(自身を含む): 47344584

約数和(自身を除く): 27462664

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 62131, 124262, 248524, 310655, 497048, 621310, 994096, 1242620, 1988192, 2485240, 3976384, 4970480, 9940960, 19881920]

約数ペア:

[(1, 19881920), (2, 9940960), (4, 4970480), (5, 3976384), (8, 2485240), (10, 1988192), (16, 1242620), (20, 994096), (32, 621310), (40, 497048), (64, 310655), (80, 248524), (160, 124262), (320, 62131)]