21497151

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{67}}^1\times {\mathrm{433}}^1$

素因数の和:535

約数の個数: 32

約数和(自身を含む): 33053440

約数和(自身を除く): 11556289

約数列:

[1, 3, 13, 19, 39, 57, 67, 201, 247, 433, 741, 871, 1273, 1299, 2613, 3819, 5629, 8227, 16549, 16887, 24681, 29011, 49647, 87033, 106951, 320853, 377143, 551209, 1131429, 1653627, 7165717, 21497151]

約数ペア:

[(1, 21497151), (3, 7165717), (13, 1653627), (19, 1131429), (39, 551209), (57, 377143), (67, 320853), (201, 106951), (247, 87033), (433, 49647), (741, 29011), (871, 24681), (1273, 16887), (1299, 16549), (2613, 8227), (3819, 5629)]