21781335

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{229}}^1\times {\mathrm{373}}^1$

素因数の和:627

約数の個数: 32

約数和(自身を含む): 37160640

約数和(自身を除く): 15379305

約数列:

[1, 3, 5, 15, 17, 51, 85, 229, 255, 373, 687, 1119, 1145, 1865, 3435, 3893, 5595, 6341, 11679, 19023, 19465, 31705, 58395, 85417, 95115, 256251, 427085, 1281255, 1452089, 4356267, 7260445, 21781335]

約数ペア:

[(1, 21781335), (3, 7260445), (5, 4356267), (15, 1452089), (17, 1281255), (51, 427085), (85, 256251), (229, 95115), (255, 85417), (373, 58395), (687, 31705), (1119, 19465), (1145, 19023), (1865, 11679), (3435, 6341), (3893, 5595)]