18812997

素因数分解:

$3^2\times 7^1\times {\mathrm{67}}^1\times {\mathrm{4457}}^1$

素因数の和:4537

約数の個数: 24

約数和(自身を含む): 31526976

約数和(自身を除く): 12713979

約数列:

[1, 3, 7, 9, 21, 63, 67, 201, 469, 603, 1407, 4221, 4457, 13371, 31199, 40113, 93597, 280791, 298619, 895857, 2090333, 2687571, 6270999, 18812997]

約数ペア:

[(1, 18812997), (3, 6270999), (7, 2687571), (9, 2090333), (21, 895857), (63, 298619), (67, 280791), (201, 93597), (469, 40113), (603, 31199), (1407, 13371), (4221, 4457)]