21300405

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{11933}}^1$

素因数の和:11965

約数の個数: 32

約数和(自身を含む): 41243904

約数和(自身を除く): 19943499

約数列:

[1, 3, 5, 7, 15, 17, 21, 35, 51, 85, 105, 119, 255, 357, 595, 1785, 11933, 35799, 59665, 83531, 178995, 202861, 250593, 417655, 608583, 1014305, 1252965, 1420027, 3042915, 4260081, 7100135, 21300405]

約数ペア:

[(1, 21300405), (3, 7100135), (5, 4260081), (7, 3042915), (15, 1420027), (17, 1252965), (21, 1014305), (35, 608583), (51, 417655), (85, 250593), (105, 202861), (119, 178995), (255, 83531), (357, 59665), (595, 35799), (1785, 11933)]