77640

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{647}}^1$

素因数の和:661

約数の個数: 32

約数和(自身を含む): 233280

約数和(自身を除く): 155640

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120, 647, 1294, 1941, 2588, 3235, 3882, 5176, 6470, 7764, 9705, 12940, 15528, 19410, 25880, 38820, 77640]

約数ペア:

[(1, 77640), (2, 38820), (3, 25880), (4, 19410), (5, 15528), (6, 12940), (8, 9705), (10, 7764), (12, 6470), (15, 5176), (20, 3882), (24, 3235), (30, 2588), (40, 1941), (60, 1294), (120, 647)]