18900231

素因数分解:

$3^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{67}}^1\times {\mathrm{101}}^1$

素因数の和:204

約数の個数: 48

約数和(自身を含む): 31628160

約数和(自身を除く): 12727929

約数列:

[1, 3, 7, 19, 21, 49, 57, 67, 101, 133, 147, 201, 303, 399, 469, 707, 931, 1273, 1407, 1919, 2121, 2793, 3283, 3819, 4949, 5757, 6767, 8911, 9849, 13433, 14847, 20301, 26733, 40299, 47369, 62377, 94031, 128573, 142107, 187131, 282093, 331583, 385719, 900011, 994749, 2700033, 6300077, 18900231]

約数ペア:

[(1, 18900231), (3, 6300077), (7, 2700033), (19, 994749), (21, 900011), (49, 385719), (57, 331583), (67, 282093), (101, 187131), (133, 142107), (147, 128573), (201, 94031), (303, 62377), (399, 47369), (469, 40299), (707, 26733), (931, 20301), (1273, 14847), (1407, 13433), (1919, 9849), (2121, 8911), (2793, 6767), (3283, 5757), (3819, 4949)]