31878340

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{122609}}^1$

素因数の和:122631

約数の個数: 24

約数和(自身を含む): 72094680

約数和(自身を除く): 40216340

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 122609, 245218, 490436, 613045, 1226090, 1593917, 2452180, 3187834, 6375668, 7969585, 15939170, 31878340]

約数ペア:

[(1, 31878340), (2, 15939170), (4, 7969585), (5, 6375668), (10, 3187834), (13, 2452180), (20, 1593917), (26, 1226090), (52, 613045), (65, 490436), (130, 245218), (260, 122609)]