21915873

素因数分解:

$3^3\times 7^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{359}}^1$

素因数の和:411

約数の個数: 64

約数和(自身を含む): 41472000

約数和(自身を除く): 19556127

約数列:

[1, 3, 7, 9, 17, 19, 21, 27, 51, 57, 63, 119, 133, 153, 171, 189, 323, 357, 359, 399, 459, 513, 969, 1071, 1077, 1197, 2261, 2513, 2907, 3213, 3231, 3591, 6103, 6783, 6821, 7539, 8721, 9693, 18309, 20349, 20463, 22617, 42721, 47747, 54927, 61047, 61389, 67851, 115957, 128163, 143241, 164781, 184167, 347871, 384489, 429723, 811699, 1043613, 1153467, 1289169, 2435097, 3130839, 7305291, 21915873]

約数ペア:

[(1, 21915873), (3, 7305291), (7, 3130839), (9, 2435097), (17, 1289169), (19, 1153467), (21, 1043613), (27, 811699), (51, 429723), (57, 384489), (63, 347871), (119, 184167), (133, 164781), (153, 143241), (171, 128163), (189, 115957), (323, 67851), (357, 61389), (359, 61047), (399, 54927), (459, 47747), (513, 42721), (969, 22617), (1071, 20463), (1077, 20349), (1197, 18309), (2261, 9693), (2513, 8721), (2907, 7539), (3213, 6821), (3231, 6783), (3591, 6103)]