20818317

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{79}}^1\times {\mathrm{233}}^1$

素因数の和:357

約数の個数: 32

約数和(自身を含む): 31449600

約数和(自身を除く): 10631283

約数列:

[1, 3, 13, 29, 39, 79, 87, 233, 237, 377, 699, 1027, 1131, 2291, 3029, 3081, 6757, 6873, 9087, 18407, 20271, 29783, 55221, 87841, 89349, 239291, 263523, 533803, 717873, 1601409, 6939439, 20818317]

約数ペア:

[(1, 20818317), (3, 6939439), (13, 1601409), (29, 717873), (39, 533803), (79, 263523), (87, 239291), (233, 89349), (237, 87841), (377, 55221), (699, 29783), (1027, 20271), (1131, 18407), (2291, 9087), (3029, 6873), (3081, 6757)]