128907740

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{495799}}^1$

素因数の和:495821

約数の個数: 24

約数和(自身を含む): 291530400

約数和(自身を除く): 162622660

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 495799, 991598, 1983196, 2478995, 4957990, 6445387, 9915980, 12890774, 25781548, 32226935, 64453870, 128907740]

約数ペア:

[(1, 128907740), (2, 64453870), (4, 32226935), (5, 25781548), (10, 12890774), (13, 9915980), (20, 6445387), (26, 4957990), (52, 2478995), (65, 1983196), (130, 991598), (260, 495799)]