78945640

素因数分解:

$2^3\times 5^1\times {\mathrm{101}}^1\times {\mathrm{19541}}^1$

素因数の和:19653

約数の個数: 32

約数和(自身を含む): 179395560

約数和(自身を除く): 100449920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 101, 202, 404, 505, 808, 1010, 2020, 4040, 19541, 39082, 78164, 97705, 156328, 195410, 390820, 781640, 1973641, 3947282, 7894564, 9868205, 15789128, 19736410, 39472820, 78945640]

約数ペア:

[(1, 78945640), (2, 39472820), (4, 19736410), (5, 15789128), (8, 9868205), (10, 7894564), (20, 3947282), (40, 1973641), (101, 781640), (202, 390820), (404, 195410), (505, 156328), (808, 97705), (1010, 78164), (2020, 39082), (4040, 19541)]