19625680

素因数分解:

$2^4\times 5^1\times {\mathrm{245321}}^1$

素因数の和:245334

約数の個数: 20

約数和(自身を含む): 45629892

約数和(自身を除く): 26004212

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 245321, 490642, 981284, 1226605, 1962568, 2453210, 3925136, 4906420, 9812840, 19625680]

約数ペア:

[(1, 19625680), (2, 9812840), (4, 4906420), (5, 3925136), (8, 2453210), (10, 1962568), (16, 1226605), (20, 981284), (40, 490642), (80, 245321)]