19957203

素因数分解:

$3^2\times 7^1\times {\mathrm{43}}^1\times {\mathrm{53}}^1\times {\mathrm{139}}^1$

素因数の和:248

約数の個数: 48

約数和(自身を含む): 34594560

約数和(自身を除く): 14637357

約数列:

[1, 3, 7, 9, 21, 43, 53, 63, 129, 139, 159, 301, 371, 387, 417, 477, 903, 973, 1113, 1251, 2279, 2709, 2919, 3339, 5977, 6837, 7367, 8757, 15953, 17931, 20511, 22101, 41839, 47859, 51569, 53793, 66303, 125517, 143577, 154707, 316781, 376551, 464121, 950343, 2217467, 2851029, 6652401, 19957203]

約数ペア:

[(1, 19957203), (3, 6652401), (7, 2851029), (9, 2217467), (21, 950343), (43, 464121), (53, 376551), (63, 316781), (129, 154707), (139, 143577), (159, 125517), (301, 66303), (371, 53793), (387, 51569), (417, 47859), (477, 41839), (903, 22101), (973, 20511), (1113, 17931), (1251, 15953), (2279, 8757), (2709, 7367), (2919, 6837), (3339, 5977)]