259889680

素因数分解:

$2^4\times 5^1\times {\mathrm{3248621}}^1$

素因数の和:3248634

約数の個数: 20

約数和(自身を含む): 604243692

約数和(自身を除く): 344354012

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 3248621, 6497242, 12994484, 16243105, 25988968, 32486210, 51977936, 64972420, 129944840, 259889680]

約数ペア:

[(1, 259889680), (2, 129944840), (4, 64972420), (5, 51977936), (8, 32486210), (10, 25988968), (16, 16243105), (20, 12994484), (40, 6497242), (80, 3248621)]