80515880

素因数分解:

$2^3\times 5^1\times {\mathrm{157}}^1\times {\mathrm{12821}}^1$

素因数の和:12989

約数の個数: 32

約数和(自身を含む): 182328840

約数和(自身を除く): 101812960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 157, 314, 628, 785, 1256, 1570, 3140, 6280, 12821, 25642, 51284, 64105, 102568, 128210, 256420, 512840, 2012897, 4025794, 8051588, 10064485, 16103176, 20128970, 40257940, 80515880]

約数ペア:

[(1, 80515880), (2, 40257940), (4, 20128970), (5, 16103176), (8, 10064485), (10, 8051588), (20, 4025794), (40, 2012897), (157, 512840), (314, 256420), (628, 128210), (785, 102568), (1256, 64105), (1570, 51284), (3140, 25642), (6280, 12821)]