21055975

素因数分解:

$5^2\times {\mathrm{31}}^1\times {\mathrm{101}}^1\times {\mathrm{269}}^1$

素因数の和:411

約数の個数: 24

約数和(自身を含む): 27319680

約数和(自身を除く): 6263705

約数列:

[1, 5, 25, 31, 101, 155, 269, 505, 775, 1345, 2525, 3131, 6725, 8339, 15655, 27169, 41695, 78275, 135845, 208475, 679225, 842239, 4211195, 21055975]

約数ペア:

[(1, 21055975), (5, 4211195), (25, 842239), (31, 679225), (101, 208475), (155, 135845), (269, 78275), (505, 41695), (775, 27169), (1345, 15655), (2525, 8339), (3131, 6725)]