21517340

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{82759}}^1$

素因数の和:82781

約数の個数: 24

約数和(自身を含む): 48662880

約数和(自身を除く): 27145540

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 82759, 165518, 331036, 413795, 827590, 1075867, 1655180, 2151734, 4303468, 5379335, 10758670, 21517340]

約数ペア:

[(1, 21517340), (2, 10758670), (4, 5379335), (5, 4303468), (10, 2151734), (13, 1655180), (20, 1075867), (26, 827590), (52, 413795), (65, 331036), (130, 165518), (260, 82759)]