80720720

素因数分解:

$2^4\times 5^1\times {\mathrm{821}}^1\times {\mathrm{1229}}^1$

素因数の和:2063

約数の個数: 40

約数和(自身を含む): 188057160

約数和(自身を除く): 107336440

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 821, 1229, 1642, 2458, 3284, 4105, 4916, 6145, 6568, 8210, 9832, 12290, 13136, 16420, 19664, 24580, 32840, 49160, 65680, 98320, 1009009, 2018018, 4036036, 5045045, 8072072, 10090090, 16144144, 20180180, 40360360, 80720720]

約数ペア:

[(1, 80720720), (2, 40360360), (4, 20180180), (5, 16144144), (8, 10090090), (10, 8072072), (16, 5045045), (20, 4036036), (40, 2018018), (80, 1009009), (821, 98320), (1229, 65680), (1642, 49160), (2458, 32840), (3284, 24580), (4105, 19664), (4916, 16420), (6145, 13136), (6568, 12290), (8210, 9832)]