20830745

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{101}}^1\times {\mathrm{167}}^1$

素因数の和:305

約数の個数: 32

約数和(自身を含む): 28788480

約数和(自身を除く): 7957735

約数列:

[1, 5, 13, 19, 65, 95, 101, 167, 247, 505, 835, 1235, 1313, 1919, 2171, 3173, 6565, 9595, 10855, 15865, 16867, 24947, 41249, 84335, 124735, 206245, 219271, 320473, 1096355, 1602365, 4166149, 20830745]

約数ペア:

[(1, 20830745), (5, 4166149), (13, 1602365), (19, 1096355), (65, 320473), (95, 219271), (101, 206245), (167, 124735), (247, 84335), (505, 41249), (835, 24947), (1235, 16867), (1313, 15865), (1919, 10855), (2171, 9595), (3173, 6565)]