21715473

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{563}}^1$

素因数の和:645

約数の個数: 32

約数和(自身を含む): 33352704

約数和(自身を除く): 11637231

約数列:

[1, 3, 13, 23, 39, 43, 69, 129, 299, 559, 563, 897, 989, 1677, 1689, 2967, 7319, 12857, 12949, 21957, 24209, 38571, 38847, 72627, 168337, 314717, 505011, 556807, 944151, 1670421, 7238491, 21715473]

約数ペア:

[(1, 21715473), (3, 7238491), (13, 1670421), (23, 944151), (39, 556807), (43, 505011), (69, 314717), (129, 168337), (299, 72627), (559, 38847), (563, 38571), (897, 24209), (989, 21957), (1677, 12949), (1689, 12857), (2967, 7319)]