21999891

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{97}}^1\times {\mathrm{173}}^1$

素因数の和:315

約数の個数: 32

約数和(自身を含む): 32739840

約数和(自身を除く): 10739949

約数列:

[1, 3, 19, 23, 57, 69, 97, 173, 291, 437, 519, 1311, 1843, 2231, 3287, 3979, 5529, 6693, 9861, 11937, 16781, 42389, 50343, 75601, 127167, 226803, 318839, 385963, 956517, 1157889, 7333297, 21999891]

約数ペア:

[(1, 21999891), (3, 7333297), (19, 1157889), (23, 956517), (57, 385963), (69, 318839), (97, 226803), (173, 127167), (291, 75601), (437, 50343), (519, 42389), (1311, 16781), (1843, 11937), (2231, 9861), (3287, 6693), (3979, 5529)]