20385475

素因数分解:

$5^2\times {\mathrm{11}}^2\times {\mathrm{23}}^1\times {\mathrm{293}}^1$

素因数の和:348

約数の個数: 36

約数和(自身を含む): 29091888

約数和(自身を除く): 8706413

約数列:

[1, 5, 11, 23, 25, 55, 115, 121, 253, 275, 293, 575, 605, 1265, 1465, 2783, 3025, 3223, 6325, 6739, 7325, 13915, 16115, 33695, 35453, 69575, 74129, 80575, 168475, 177265, 370645, 815419, 886325, 1853225, 4077095, 20385475]

約数ペア:

[(1, 20385475), (5, 4077095), (11, 1853225), (23, 886325), (25, 815419), (55, 370645), (115, 177265), (121, 168475), (253, 80575), (275, 74129), (293, 69575), (575, 35453), (605, 33695), (1265, 16115), (1465, 13915), (2783, 7325), (3025, 6739), (3223, 6325)]