21091203

素因数分解:

$3^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{47}}^1\times {\mathrm{419}}^1$

素因数の和:496

約数の個数: 48

約数和(自身を含む): 37739520

約数和(自身を除く): 16648317

約数列:

[1, 3, 7, 9, 17, 21, 47, 51, 63, 119, 141, 153, 329, 357, 419, 423, 799, 987, 1071, 1257, 2397, 2933, 2961, 3771, 5593, 7123, 7191, 8799, 16779, 19693, 21369, 26397, 49861, 50337, 59079, 64107, 137851, 149583, 177237, 334781, 413553, 448749, 1004343, 1240659, 2343467, 3013029, 7030401, 21091203]

約数ペア:

[(1, 21091203), (3, 7030401), (7, 3013029), (9, 2343467), (17, 1240659), (21, 1004343), (47, 448749), (51, 413553), (63, 334781), (119, 177237), (141, 149583), (153, 137851), (329, 64107), (357, 59079), (419, 50337), (423, 49861), (799, 26397), (987, 21369), (1071, 19693), (1257, 16779), (2397, 8799), (2933, 7191), (2961, 7123), (3771, 5593)]