21316689

素因数分解:

$3^{10}\times {\mathrm{19}}^2$

素因数の和:68

約数の個数: 33

約数和(自身を含む): 33746313

約数和(自身を除く): 12429624

約数列:

[1, 3, 9, 19, 27, 57, 81, 171, 243, 361, 513, 729, 1083, 1539, 2187, 3249, 4617, 6561, 9747, 13851, 19683, 29241, 41553, 59049, 87723, 124659, 263169, 373977, 789507, 1121931, 2368521, 7105563, 21316689]

約数ペア:

[(1, 21316689), (3, 7105563), (9, 2368521), (19, 1121931), (27, 789507), (57, 373977), (81, 263169), (171, 124659), (243, 87723), (361, 59049), (513, 41553), (729, 29241), (1083, 19683), (1539, 13851), (2187, 9747), (3249, 6561)]