20881965

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{173}}^1\times {\mathrm{619}}^1$

素因数の和:813

約数の個数: 32

約数和(自身を含む): 36247680

約数和(自身を除く): 15365715

約数列:

[1, 3, 5, 13, 15, 39, 65, 173, 195, 519, 619, 865, 1857, 2249, 2595, 3095, 6747, 8047, 9285, 11245, 24141, 33735, 40235, 107087, 120705, 321261, 535435, 1392131, 1606305, 4176393, 6960655, 20881965]

約数ペア:

[(1, 20881965), (3, 6960655), (5, 4176393), (13, 1606305), (15, 1392131), (39, 535435), (65, 321261), (173, 120705), (195, 107087), (519, 40235), (619, 33735), (865, 24141), (1857, 11245), (2249, 9285), (2595, 8047), (3095, 6747)]