79964840

素因数分解:

$2^3\times 5^1\times {\mathrm{1999121}}^1$

素因数の和:1999132

約数の個数: 16

約数和(自身を含む): 179920980

約数和(自身を除く): 99956140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 1999121, 3998242, 7996484, 9995605, 15992968, 19991210, 39982420, 79964840]

約数ペア:

[(1, 79964840), (2, 39982420), (4, 19991210), (5, 15992968), (8, 9995605), (10, 7996484), (20, 3998242), (40, 1999121)]