81904180

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{57679}}^1$

素因数の和:57759

約数の個数: 24

約数和(自身を含む): 174424320

約数和(自身を除く): 92520140

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 710, 1420, 57679, 115358, 230716, 288395, 576790, 1153580, 4095209, 8190418, 16380836, 20476045, 40952090, 81904180]

約数ペア:

[(1, 81904180), (2, 40952090), (4, 20476045), (5, 16380836), (10, 8190418), (20, 4095209), (71, 1153580), (142, 576790), (284, 288395), (355, 230716), (710, 115358), (1420, 57679)]