21305007

素因数分解:

$3^2\times {\mathrm{37}}^1\times {\mathrm{137}}^1\times {\mathrm{467}}^1$

素因数の和:647

約数の個数: 24

約数和(自身を含む): 31904496

約数和(自身を除く): 10599489

約数列:

[1, 3, 9, 37, 111, 137, 333, 411, 467, 1233, 1401, 4203, 5069, 15207, 17279, 45621, 51837, 63979, 155511, 191937, 575811, 2367223, 7101669, 21305007]

約数ペア:

[(1, 21305007), (3, 7101669), (9, 2367223), (37, 575811), (111, 191937), (137, 155511), (333, 63979), (411, 51837), (467, 45621), (1233, 17279), (1401, 15207), (4203, 5069)]