21228645

素因数分解:

$3^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{643}}^1$

素因数の和:753

約数の個数: 32

約数和(自身を含む): 35610624

約数和(自身を除く): 14381979

約数列:

[1, 3, 5, 15, 31, 71, 93, 155, 213, 355, 465, 643, 1065, 1929, 2201, 3215, 6603, 9645, 11005, 19933, 33015, 45653, 59799, 99665, 136959, 228265, 298995, 684795, 1415243, 4245729, 7076215, 21228645]

約数ペア:

[(1, 21228645), (3, 7076215), (5, 4245729), (15, 1415243), (31, 684795), (71, 298995), (93, 228265), (155, 136959), (213, 99665), (355, 59799), (465, 45653), (643, 33015), (1065, 19933), (1929, 11005), (2201, 9645), (3215, 6603)]