21319857

素因数分解:

$3^2\times {\mathrm{13}}^2\times {\mathrm{107}}^1\times {\mathrm{131}}^1$

素因数の和:270

約数の個数: 36

約数和(自身を含む): 33915024

約数和(自身を除く): 12595167

約数列:

[1, 3, 9, 13, 39, 107, 117, 131, 169, 321, 393, 507, 963, 1179, 1391, 1521, 1703, 4173, 5109, 12519, 14017, 15327, 18083, 22139, 42051, 54249, 66417, 126153, 162747, 182221, 199251, 546663, 1639989, 2368873, 7106619, 21319857]

約数ペア:

[(1, 21319857), (3, 7106619), (9, 2368873), (13, 1639989), (39, 546663), (107, 199251), (117, 182221), (131, 162747), (169, 126153), (321, 66417), (393, 54249), (507, 42051), (963, 22139), (1179, 18083), (1391, 15327), (1521, 14017), (1703, 12519), (4173, 5109)]