21812031

素因数分解:

$3^3\times {\mathrm{29}}^1\times {\mathrm{89}}^1\times {\mathrm{313}}^1$

素因数の和:440

約数の個数: 32

約数和(自身を含む): 33912000

約数和(自身を除く): 12099969

約数列:

[1, 3, 9, 27, 29, 87, 89, 261, 267, 313, 783, 801, 939, 2403, 2581, 2817, 7743, 8451, 9077, 23229, 27231, 27857, 69687, 81693, 83571, 245079, 250713, 752139, 807853, 2423559, 7270677, 21812031]

約数ペア:

[(1, 21812031), (3, 7270677), (9, 2423559), (27, 807853), (29, 752139), (87, 250713), (89, 245079), (261, 83571), (267, 81693), (313, 69687), (783, 27857), (801, 27231), (939, 23229), (2403, 9077), (2581, 8451), (2817, 7743)]