80812880

素因数分解:

$2^4\times 5^1\times {\mathrm{181}}^1\times {\mathrm{5581}}^1$

素因数の和:5775

約数の個数: 40

約数和(自身を含む): 188961864

約数和(自身を除く): 108148984

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 181, 362, 724, 905, 1448, 1810, 2896, 3620, 5581, 7240, 11162, 14480, 22324, 27905, 44648, 55810, 89296, 111620, 223240, 446480, 1010161, 2020322, 4040644, 5050805, 8081288, 10101610, 16162576, 20203220, 40406440, 80812880]

約数ペア:

[(1, 80812880), (2, 40406440), (4, 20203220), (5, 16162576), (8, 10101610), (10, 8081288), (16, 5050805), (20, 4040644), (40, 2020322), (80, 1010161), (181, 446480), (362, 223240), (724, 111620), (905, 89296), (1448, 55810), (1810, 44648), (2896, 27905), (3620, 22324), (5581, 14480), (7240, 11162)]