21280090

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{9629}}^1$

素因数の和:9666

約数の個数: 32

約数和(自身を含む): 43681680

約数和(自身を除く): 22401590

約数列:

[1, 2, 5, 10, 13, 17, 26, 34, 65, 85, 130, 170, 221, 442, 1105, 2210, 9629, 19258, 48145, 96290, 125177, 163693, 250354, 327386, 625885, 818465, 1251770, 1636930, 2128009, 4256018, 10640045, 21280090]

約数ペア:

[(1, 21280090), (2, 10640045), (5, 4256018), (10, 2128009), (13, 1636930), (17, 1251770), (26, 818465), (34, 625885), (65, 327386), (85, 250354), (130, 163693), (170, 125177), (221, 96290), (442, 48145), (1105, 19258), (2210, 9629)]