21005955

素因数分解:

$3^2\times 5^1\times {\mathrm{181}}^1\times {\mathrm{2579}}^1$

素因数の和:2771

約数の個数: 24

約数和(自身を含む): 36625680

約数和(自身を除く): 15619725

約数列:

[1, 3, 5, 9, 15, 45, 181, 543, 905, 1629, 2579, 2715, 7737, 8145, 12895, 23211, 38685, 116055, 466799, 1400397, 2333995, 4201191, 7001985, 21005955]

約数ペア:

[(1, 21005955), (3, 7001985), (5, 4201191), (9, 2333995), (15, 1400397), (45, 466799), (181, 116055), (543, 38685), (905, 23211), (1629, 12895), (2579, 8145), (2715, 7737)]