20538075

素因数分解:

$3^1\times 5^2\times {\mathrm{251}}^1\times {\mathrm{1091}}^1$

素因数の和:1355

約数の個数: 24

約数和(自身を含む): 34122816

約数和(自身を除く): 13584741

約数列:

[1, 3, 5, 15, 25, 75, 251, 753, 1091, 1255, 3273, 3765, 5455, 6275, 16365, 18825, 27275, 81825, 273841, 821523, 1369205, 4107615, 6846025, 20538075]

約数ペア:

[(1, 20538075), (3, 6846025), (5, 4107615), (15, 1369205), (25, 821523), (75, 273841), (251, 81825), (753, 27275), (1091, 18825), (1255, 16365), (3273, 6275), (3765, 5455)]