20391305

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{229}}^1\times {\mathrm{1619}}^1$

素因数の和:1864

約数の個数: 16

約数和(自身を含む): 26827200

約数和(自身を除く): 6435895

約数列:

[1, 5, 11, 55, 229, 1145, 1619, 2519, 8095, 12595, 17809, 89045, 370751, 1853755, 4078261, 20391305]

約数ペア:

[(1, 20391305), (5, 4078261), (11, 1853755), (55, 370751), (229, 89045), (1145, 17809), (1619, 12595), (2519, 8095)]