21376305

素因数分解:

$3^4\times 5^1\times {\mathrm{47}}^1\times {\mathrm{1123}}^1$

素因数の和:1187

約数の個数: 40

約数和(自身を含む): 39169152

約数和(自身を除く): 17792847

約数列:

[1, 3, 5, 9, 15, 27, 45, 47, 81, 135, 141, 235, 405, 423, 705, 1123, 1269, 2115, 3369, 3807, 5615, 6345, 10107, 16845, 19035, 30321, 50535, 52781, 90963, 151605, 158343, 263905, 454815, 475029, 791715, 1425087, 2375145, 4275261, 7125435, 21376305]

約数ペア:

[(1, 21376305), (3, 7125435), (5, 4275261), (9, 2375145), (15, 1425087), (27, 791715), (45, 475029), (47, 454815), (81, 263905), (135, 158343), (141, 151605), (235, 90963), (405, 52781), (423, 50535), (705, 30321), (1123, 19035), (1269, 16845), (2115, 10107), (3369, 6345), (3807, 5615)]