687440

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{661}}^1$

素因数の和:687

約数の個数: 40

約数和(自身を含む): 1723848

約数和(自身を除く): 1036408

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 661, 1040, 1322, 2644, 3305, 5288, 6610, 8593, 10576, 13220, 17186, 26440, 34372, 42965, 52880, 68744, 85930, 137488, 171860, 343720, 687440]

約数ペア:

[(1, 687440), (2, 343720), (4, 171860), (5, 137488), (8, 85930), (10, 68744), (13, 52880), (16, 42965), (20, 34372), (26, 26440), (40, 17186), (52, 13220), (65, 10576), (80, 8593), (104, 6610), (130, 5288), (208, 3305), (260, 2644), (520, 1322), (661, 1040)]