18977895

素因数分解:

$3^4\times 5^1\times {\mathrm{47}}^1\times {\mathrm{997}}^1$

素因数の和:1061

約数の個数: 40

約数和(自身を含む): 34778304

約数和(自身を除く): 15800409

約数列:

[1, 3, 5, 9, 15, 27, 45, 47, 81, 135, 141, 235, 405, 423, 705, 997, 1269, 2115, 2991, 3807, 4985, 6345, 8973, 14955, 19035, 26919, 44865, 46859, 80757, 134595, 140577, 234295, 403785, 421731, 702885, 1265193, 2108655, 3795579, 6325965, 18977895]

約数ペア:

[(1, 18977895), (3, 6325965), (5, 3795579), (9, 2108655), (15, 1265193), (27, 702885), (45, 421731), (47, 403785), (81, 234295), (135, 140577), (141, 134595), (235, 80757), (405, 46859), (423, 44865), (705, 26919), (997, 19035), (1269, 14955), (2115, 8973), (2991, 6345), (3807, 4985)]