20708457

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{157}}^1\times {\mathrm{571}}^1$

素因数の和:749

約数の個数: 32

約数和(自身を含む): 34704384

約数和(自身を除く): 13995927

約数列:

[1, 3, 7, 11, 21, 33, 77, 157, 231, 471, 571, 1099, 1713, 1727, 3297, 3997, 5181, 6281, 11991, 12089, 18843, 36267, 43967, 89647, 131901, 268941, 627529, 986117, 1882587, 2958351, 6902819, 20708457]

約数ペア:

[(1, 20708457), (3, 6902819), (7, 2958351), (11, 1882587), (21, 986117), (33, 627529), (77, 268941), (157, 131901), (231, 89647), (471, 43967), (571, 36267), (1099, 18843), (1713, 12089), (1727, 11991), (3297, 6281), (3997, 5181)]