21085813

素因数分解:

$7^1\times {\mathrm{29}}^1\times {\mathrm{241}}^1\times {\mathrm{431}}^1$

素因数の和:708

約数の個数: 16

約数和(自身を含む): 25090560

約数和(自身を除く): 4004747

約数列:

[1, 7, 29, 203, 241, 431, 1687, 3017, 6989, 12499, 48923, 87493, 103871, 727097, 3012259, 21085813]

約数ペア:

[(1, 21085813), (7, 3012259), (29, 727097), (203, 103871), (241, 87493), (431, 48923), (1687, 12499), (3017, 6989)]