20108907

素因数分解:

$3^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{571}}^1$

素因数の和:640

約数の個数: 48

約数和(自身を含む): 36644608

約数和(自身を除く): 16535701

約数列:

[1, 3, 7, 9, 13, 21, 39, 43, 63, 91, 117, 129, 273, 301, 387, 559, 571, 819, 903, 1677, 1713, 2709, 3913, 3997, 5031, 5139, 7423, 11739, 11991, 22269, 24553, 35217, 35973, 51961, 66807, 73659, 155883, 171871, 220977, 319189, 467649, 515613, 957567, 1546839, 2234323, 2872701, 6702969, 20108907]

約数ペア:

[(1, 20108907), (3, 6702969), (7, 2872701), (9, 2234323), (13, 1546839), (21, 957567), (39, 515613), (43, 467649), (63, 319189), (91, 220977), (117, 171871), (129, 155883), (273, 73659), (301, 66807), (387, 51961), (559, 35973), (571, 35217), (819, 24553), (903, 22269), (1677, 11991), (1713, 11739), (2709, 7423), (3913, 5139), (3997, 5031)]