21445821

素因数分解:

$3^2\times {\mathrm{23}}^1\times {\mathrm{313}}^1\times {\mathrm{331}}^1$

素因数の和:673

約数の個数: 24

約数和(自身を含む): 32525376

約数和(自身を除く): 11079555

約数列:

[1, 3, 9, 23, 69, 207, 313, 331, 939, 993, 2817, 2979, 7199, 7613, 21597, 22839, 64791, 68517, 103603, 310809, 932427, 2382869, 7148607, 21445821]

約数ペア:

[(1, 21445821), (3, 7148607), (9, 2382869), (23, 932427), (69, 310809), (207, 103603), (313, 68517), (331, 64791), (939, 22839), (993, 21597), (2817, 7613), (2979, 7199)]