20945775

素因数分解:

$3^1\times 5^2\times {\mathrm{317}}^1\times {\mathrm{881}}^1$

素因数の和:1211

約数の個数: 24

約数和(自身を含む): 34779024

約数和(自身を除く): 13833249

約数列:

[1, 3, 5, 15, 25, 75, 317, 881, 951, 1585, 2643, 4405, 4755, 7925, 13215, 22025, 23775, 66075, 279277, 837831, 1396385, 4189155, 6981925, 20945775]

約数ペア:

[(1, 20945775), (3, 6981925), (5, 4189155), (15, 1396385), (25, 837831), (75, 279277), (317, 66075), (881, 23775), (951, 22025), (1585, 13215), (2643, 7925), (4405, 4755)]