128772020

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{495277}}^1$

素因数の和:495299

約数の個数: 24

約数和(自身を含む): 291223464

約数和(自身を除く): 162451444

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 495277, 990554, 1981108, 2476385, 4952770, 6438601, 9905540, 12877202, 25754404, 32193005, 64386010, 128772020]

約数ペア:

[(1, 128772020), (2, 64386010), (4, 32193005), (5, 25754404), (10, 12877202), (13, 9905540), (20, 6438601), (26, 4952770), (52, 2476385), (65, 1981108), (130, 990554), (260, 495277)]