128961820

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{496007}}^1$

素因数の和:496029

約数の個数: 24

約数和(自身を含む): 291652704

約数和(自身を除く): 162690884

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 496007, 992014, 1984028, 2480035, 4960070, 6448091, 9920140, 12896182, 25792364, 32240455, 64480910, 128961820]

約数ペア:

[(1, 128961820), (2, 64480910), (4, 32240455), (5, 25792364), (10, 12896182), (13, 9920140), (20, 6448091), (26, 4960070), (52, 2480035), (65, 1984028), (130, 992014), (260, 496007)]