21081710

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{257}}^1\times {\mathrm{631}}^1$

素因数の和:908

約数の個数: 32

約数和(自身を含む): 41090112

約数和(自身を除く): 20008402

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 257, 514, 631, 1262, 1285, 2570, 3155, 3341, 6310, 6682, 8203, 16406, 16705, 33410, 41015, 82030, 162167, 324334, 810835, 1621670, 2108171, 4216342, 10540855, 21081710]

約数ペア:

[(1, 21081710), (2, 10540855), (5, 4216342), (10, 2108171), (13, 1621670), (26, 810835), (65, 324334), (130, 162167), (257, 82030), (514, 41015), (631, 33410), (1262, 16705), (1285, 16406), (2570, 8203), (3155, 6682), (3341, 6310)]