28440620

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{109387}}^1$

素因数の和:109409

約数の個数: 24

約数和(自身を含む): 64320144

約数和(自身を除く): 35879524

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 109387, 218774, 437548, 546935, 1093870, 1422031, 2187740, 2844062, 5688124, 7110155, 14220310, 28440620]

約数ペア:

[(1, 28440620), (2, 14220310), (4, 7110155), (5, 5688124), (10, 2844062), (13, 2187740), (20, 1422031), (26, 1093870), (52, 546935), (65, 437548), (130, 218774), (260, 109387)]