66811420

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{256967}}^1$

素因数の和:256989

約数の個数: 24

約数和(自身を含む): 151097184

約数和(自身を除く): 84285764

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 256967, 513934, 1027868, 1284835, 2569670, 3340571, 5139340, 6681142, 13362284, 16702855, 33405710, 66811420]

約数ペア:

[(1, 66811420), (2, 33405710), (4, 16702855), (5, 13362284), (10, 6681142), (13, 5139340), (20, 3340571), (26, 2569670), (52, 1284835), (65, 1027868), (130, 513934), (260, 256967)]