21765105

素因数分解:

$3^4\times 5^1\times {\mathrm{61}}^1\times {\mathrm{881}}^1$

素因数の和:959

約数の個数: 40

約数和(自身を含む): 39700584

約数和(自身を除く): 17935479

約数列:

[1, 3, 5, 9, 15, 27, 45, 61, 81, 135, 183, 305, 405, 549, 881, 915, 1647, 2643, 2745, 4405, 4941, 7929, 8235, 13215, 23787, 24705, 39645, 53741, 71361, 118935, 161223, 268705, 356805, 483669, 806115, 1451007, 2418345, 4353021, 7255035, 21765105]

約数ペア:

[(1, 21765105), (3, 7255035), (5, 4353021), (9, 2418345), (15, 1451007), (27, 806115), (45, 483669), (61, 356805), (81, 268705), (135, 161223), (183, 118935), (305, 71361), (405, 53741), (549, 39645), (881, 24705), (915, 23787), (1647, 13215), (2643, 8235), (2745, 7929), (4405, 4941)]