21123333

素因数分解:

$3^2\times 7^1\times {\mathrm{11}}^2\times {\mathrm{17}}^1\times {\mathrm{163}}^1$

素因数の和:215

約数の個数: 72

約数和(自身を含む): 40832064

約数和(自身を除く): 19708731

約数列:

[1, 3, 7, 9, 11, 17, 21, 33, 51, 63, 77, 99, 119, 121, 153, 163, 187, 231, 357, 363, 489, 561, 693, 847, 1071, 1089, 1141, 1309, 1467, 1683, 1793, 2057, 2541, 2771, 3423, 3927, 5379, 6171, 7623, 8313, 10269, 11781, 12551, 14399, 16137, 18513, 19397, 19723, 24939, 30481, 37653, 43197, 58191, 59169, 91443, 112959, 129591, 138061, 174573, 177507, 213367, 274329, 335291, 414183, 640101, 1005873, 1242549, 1920303, 2347037, 3017619, 7041111, 21123333]

約数ペア:

[(1, 21123333), (3, 7041111), (7, 3017619), (9, 2347037), (11, 1920303), (17, 1242549), (21, 1005873), (33, 640101), (51, 414183), (63, 335291), (77, 274329), (99, 213367), (119, 177507), (121, 174573), (153, 138061), (163, 129591), (187, 112959), (231, 91443), (357, 59169), (363, 58191), (489, 43197), (561, 37653), (693, 30481), (847, 24939), (1071, 19723), (1089, 19397), (1141, 18513), (1309, 16137), (1467, 14399), (1683, 12551), (1793, 11781), (2057, 10269), (2541, 8313), (2771, 7623), (3423, 6171), (3927, 5379)]