21140805

素因数分解:

$3^1\times 5^1\times 7^4\times {\mathrm{587}}^1$

素因数の和:623

約数の個数: 40

約数和(自身を含む): 39527712

約数和(自身を除く): 18386907

約数列:

[1, 3, 5, 7, 15, 21, 35, 49, 105, 147, 245, 343, 587, 735, 1029, 1715, 1761, 2401, 2935, 4109, 5145, 7203, 8805, 12005, 12327, 20545, 28763, 36015, 61635, 86289, 143815, 201341, 431445, 604023, 1006705, 1409387, 3020115, 4228161, 7046935, 21140805]

約数ペア:

[(1, 21140805), (3, 7046935), (5, 4228161), (7, 3020115), (15, 1409387), (21, 1006705), (35, 604023), (49, 431445), (105, 201341), (147, 143815), (245, 86289), (343, 61635), (587, 36015), (735, 28763), (1029, 20545), (1715, 12327), (1761, 12005), (2401, 8805), (2935, 7203), (4109, 5145)]