21557431

素因数分解:

$7^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{2423}}^1$

素因数の和:2502

約数の個数: 16

約数和(自身を含む): 26062848

約数和(自身を除く): 4505417

約数列:

[1, 7, 31, 41, 217, 287, 1271, 2423, 8897, 16961, 75113, 99343, 525791, 695401, 3079633, 21557431]

約数ペア:

[(1, 21557431), (7, 3079633), (31, 695401), (41, 525791), (217, 99343), (287, 75113), (1271, 16961), (2423, 8897)]