21199563

素因数分解:

$3^5\times 7^1\times {\mathrm{11}}^2\times {\mathrm{103}}^1$

素因数の和:147

約数の個数: 72

約数和(自身を含む): 40278784

約数和(自身を除く): 19079221

約数列:

[1, 3, 7, 9, 11, 21, 27, 33, 63, 77, 81, 99, 103, 121, 189, 231, 243, 297, 309, 363, 567, 693, 721, 847, 891, 927, 1089, 1133, 1701, 2079, 2163, 2541, 2673, 2781, 3267, 3399, 6237, 6489, 7623, 7931, 8343, 9801, 10197, 12463, 18711, 19467, 22869, 23793, 25029, 29403, 30591, 37389, 58401, 68607, 71379, 87241, 91773, 112167, 175203, 205821, 214137, 261723, 275319, 336501, 642411, 785169, 1009503, 1927233, 2355507, 3028509, 7066521, 21199563]

約数ペア:

[(1, 21199563), (3, 7066521), (7, 3028509), (9, 2355507), (11, 1927233), (21, 1009503), (27, 785169), (33, 642411), (63, 336501), (77, 275319), (81, 261723), (99, 214137), (103, 205821), (121, 175203), (189, 112167), (231, 91773), (243, 87241), (297, 71379), (309, 68607), (363, 58401), (567, 37389), (693, 30591), (721, 29403), (847, 25029), (891, 23793), (927, 22869), (1089, 19467), (1133, 18711), (1701, 12463), (2079, 10197), (2163, 9801), (2541, 8343), (2673, 7931), (2781, 7623), (3267, 6489), (3399, 6237)]