21091749

素因数分解:

$3^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{179}}^1\times {\mathrm{181}}^1$

素因数の和:401

約数の個数: 32

約数和(自身を含む): 33546240

約数和(自身を除く): 12454491

約数列:

[1, 3, 7, 21, 31, 93, 179, 181, 217, 537, 543, 651, 1253, 1267, 3759, 3801, 5549, 5611, 16647, 16833, 32399, 38843, 39277, 97197, 116529, 117831, 226793, 680379, 1004369, 3013107, 7030583, 21091749]

約数ペア:

[(1, 21091749), (3, 7030583), (7, 3013107), (21, 1004369), (31, 680379), (93, 226793), (179, 117831), (181, 116529), (217, 97197), (537, 39277), (543, 38843), (651, 32399), (1253, 16833), (1267, 16647), (3759, 5611), (3801, 5549)]