21664305

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{1277}}^1$

素因数の和:1330

約数の個数: 48

約数和(自身を含む): 41867280

約数和(自身を除く): 20202975

約数列:

[1, 3, 5, 9, 13, 15, 29, 39, 45, 65, 87, 117, 145, 195, 261, 377, 435, 585, 1131, 1277, 1305, 1885, 3393, 3831, 5655, 6385, 11493, 16601, 16965, 19155, 37033, 49803, 57465, 83005, 111099, 149409, 185165, 249015, 333297, 481429, 555495, 747045, 1444287, 1666485, 2407145, 4332861, 7221435, 21664305]

約数ペア:

[(1, 21664305), (3, 7221435), (5, 4332861), (9, 2407145), (13, 1666485), (15, 1444287), (29, 747045), (39, 555495), (45, 481429), (65, 333297), (87, 249015), (117, 185165), (145, 149409), (195, 111099), (261, 83005), (377, 57465), (435, 49803), (585, 37033), (1131, 19155), (1277, 16965), (1305, 16601), (1885, 11493), (3393, 6385), (3831, 5655)]