21492045

素因数分解:

$3^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{383}}^1$

素因数の和:466

約数の個数: 48

約数和(自身を含む): 39536640

約数和(自身を除く): 18044595

約数列:

[1, 3, 5, 9, 15, 29, 43, 45, 87, 129, 145, 215, 261, 383, 387, 435, 645, 1149, 1247, 1305, 1915, 1935, 3447, 3741, 5745, 6235, 11107, 11223, 16469, 17235, 18705, 33321, 49407, 55535, 56115, 82345, 99963, 148221, 166605, 247035, 477601, 499815, 741105, 1432803, 2388005, 4298409, 7164015, 21492045]

約数ペア:

[(1, 21492045), (3, 7164015), (5, 4298409), (9, 2388005), (15, 1432803), (29, 741105), (43, 499815), (45, 477601), (87, 247035), (129, 166605), (145, 148221), (215, 99963), (261, 82345), (383, 56115), (387, 55535), (435, 49407), (645, 33321), (1149, 18705), (1247, 17235), (1305, 16469), (1915, 11223), (1935, 11107), (3447, 6235), (3741, 5745)]