21807280

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{24781}}^1$

素因数の和:24805

約数の個数: 40

約数和(自身を含む): 55313424

約数和(自身を除く): 33506144

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 110, 176, 220, 440, 880, 24781, 49562, 99124, 123905, 198248, 247810, 272591, 396496, 495620, 545182, 991240, 1090364, 1362955, 1982480, 2180728, 2725910, 4361456, 5451820, 10903640, 21807280]

約数ペア:

[(1, 21807280), (2, 10903640), (4, 5451820), (5, 4361456), (8, 2725910), (10, 2180728), (11, 1982480), (16, 1362955), (20, 1090364), (22, 991240), (40, 545182), (44, 495620), (55, 396496), (80, 272591), (88, 247810), (110, 198248), (176, 123905), (220, 99124), (440, 49562), (880, 24781)]