21440770

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{131}}^1\times {\mathrm{1259}}^1$

素因数の和:1410

約数の個数: 32

約数和(自身を含む): 41912640

約数和(自身を除く): 20471870

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 131, 262, 655, 1259, 1310, 1703, 2518, 3406, 6295, 8515, 12590, 16367, 17030, 32734, 81835, 163670, 164929, 329858, 824645, 1649290, 2144077, 4288154, 10720385, 21440770]

約数ペア:

[(1, 21440770), (2, 10720385), (5, 4288154), (10, 2144077), (13, 1649290), (26, 824645), (65, 329858), (130, 164929), (131, 163670), (262, 81835), (655, 32734), (1259, 17030), (1310, 16367), (1703, 12590), (2518, 8515), (3406, 6295)]