9920620

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{16001}}^1$

素因数の和:16041

約数の個数: 24

約数和(自身を含む): 21506688

約数和(自身を除く): 11586068

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620, 16001, 32002, 64004, 80005, 160010, 320020, 496031, 992062, 1984124, 2480155, 4960310, 9920620]

約数ペア:

[(1, 9920620), (2, 4960310), (4, 2480155), (5, 1984124), (10, 992062), (20, 496031), (31, 320020), (62, 160010), (124, 80005), (155, 64004), (310, 32002), (620, 16001)]