64805780

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{249253}}^1$

素因数の和:249275

約数の個数: 24

約数和(自身を含む): 146561352

約数和(自身を除く): 81755572

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 249253, 498506, 997012, 1246265, 2492530, 3240289, 4985060, 6480578, 12961156, 16201445, 32402890, 64805780]

約数ペア:

[(1, 64805780), (2, 32402890), (4, 16201445), (5, 12961156), (10, 6480578), (13, 4985060), (20, 3240289), (26, 2492530), (52, 1246265), (65, 997012), (130, 498506), (260, 249253)]