20808837

素因数分解:

$3^2\times 7^1\times {\mathrm{37}}^1\times {\mathrm{79}}^1\times {\mathrm{113}}^1$

素因数の和:242

約数の個数: 48

約数和(自身を含む): 36042240

約数和(自身を除く): 15233403

約数列:

[1, 3, 7, 9, 21, 37, 63, 79, 111, 113, 237, 259, 333, 339, 553, 711, 777, 791, 1017, 1659, 2331, 2373, 2923, 4181, 4977, 7119, 8769, 8927, 12543, 20461, 26307, 26781, 29267, 37629, 61383, 62489, 80343, 87801, 184149, 187467, 263403, 330299, 562401, 990897, 2312093, 2972691, 6936279, 20808837]

約数ペア:

[(1, 20808837), (3, 6936279), (7, 2972691), (9, 2312093), (21, 990897), (37, 562401), (63, 330299), (79, 263403), (111, 187467), (113, 184149), (237, 87801), (259, 80343), (333, 62489), (339, 61383), (553, 37629), (711, 29267), (777, 26781), (791, 26307), (1017, 20461), (1659, 12543), (2331, 8927), (2373, 8769), (2923, 7119), (4181, 4977)]