64705420

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{248867}}^1$

素因数の和:248889

約数の個数: 24

約数和(自身を含む): 146334384

約数和(自身を除く): 81628964

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 248867, 497734, 995468, 1244335, 2488670, 3235271, 4977340, 6470542, 12941084, 16176355, 32352710, 64705420]

約数ペア:

[(1, 64705420), (2, 32352710), (4, 16176355), (5, 12941084), (10, 6470542), (13, 4977340), (20, 3235271), (26, 2488670), (52, 1244335), (65, 995468), (130, 497734), (260, 248867)]