18879380

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{72613}}^1$

素因数の和:72635

約数の個数: 24

約数和(自身を含む): 42697032

約数和(自身を除く): 23817652

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 72613, 145226, 290452, 363065, 726130, 943969, 1452260, 1887938, 3775876, 4719845, 9439690, 18879380]

約数ペア:

[(1, 18879380), (2, 9439690), (4, 4719845), (5, 3775876), (10, 1887938), (13, 1452260), (20, 943969), (26, 726130), (52, 363065), (65, 290452), (130, 145226), (260, 72613)]