20078721

素因数分解:

$3^2\times {\mathrm{13}}^2\times {\mathrm{43}}^1\times {\mathrm{307}}^1$

素因数の和:382

約数の個数: 36

約数和(自身を含む): 32240208

約数和(自身を除く): 12161487

約数列:

[1, 3, 9, 13, 39, 43, 117, 129, 169, 307, 387, 507, 559, 921, 1521, 1677, 2763, 3991, 5031, 7267, 11973, 13201, 21801, 35919, 39603, 51883, 65403, 118809, 155649, 171613, 466947, 514839, 1544517, 2230969, 6692907, 20078721]

約数ペア:

[(1, 20078721), (3, 6692907), (9, 2230969), (13, 1544517), (39, 514839), (43, 466947), (117, 171613), (129, 155649), (169, 118809), (307, 65403), (387, 51883), (507, 39603), (559, 35919), (921, 21801), (1521, 13201), (1677, 11973), (2763, 7267), (3991, 5031)]