21069783

素因数分解:

$3^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{103}}^1\times {\mathrm{191}}^1$

素因数の和:324

約数の個数: 48

約数和(自身を含む): 37380096

約数和(自身を除く): 16310313

約数列:

[1, 3, 7, 9, 17, 21, 51, 63, 103, 119, 153, 191, 309, 357, 573, 721, 927, 1071, 1337, 1719, 1751, 2163, 3247, 4011, 5253, 6489, 9741, 12033, 12257, 15759, 19673, 22729, 29223, 36771, 59019, 68187, 110313, 137711, 177057, 204561, 334441, 413133, 1003323, 1239399, 2341087, 3009969, 7023261, 21069783]

約数ペア:

[(1, 21069783), (3, 7023261), (7, 3009969), (9, 2341087), (17, 1239399), (21, 1003323), (51, 413133), (63, 334441), (103, 204561), (119, 177057), (153, 137711), (191, 110313), (309, 68187), (357, 59019), (573, 36771), (721, 29223), (927, 22729), (1071, 19673), (1337, 15759), (1719, 12257), (1751, 12033), (2163, 9741), (3247, 6489), (4011, 5253)]