21965645

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{3797}}^1$

素因数の和:3904

約数の個数: 16

約数和(自身を含む): 28712880

約数和(自身を除く): 6747235

約数列:

[1, 5, 13, 65, 89, 445, 1157, 3797, 5785, 18985, 49361, 246805, 337933, 1689665, 4393129, 21965645]

約数ペア:

[(1, 21965645), (5, 4393129), (13, 1689665), (65, 337933), (89, 246805), (445, 49361), (1157, 18985), (3797, 5785)]