19870965

素因数分解:

$3^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{73}}^1\times {\mathrm{263}}^1$

素因数の和:370

約数の個数: 48

約数和(自身を含む): 36571392

約数和(自身を除く): 16700427

約数列:

[1, 3, 5, 9, 15, 23, 45, 69, 73, 115, 207, 219, 263, 345, 365, 657, 789, 1035, 1095, 1315, 1679, 2367, 3285, 3945, 5037, 6049, 8395, 11835, 15111, 18147, 19199, 25185, 30245, 54441, 57597, 75555, 90735, 95995, 172791, 272205, 287985, 441577, 863955, 1324731, 2207885, 3974193, 6623655, 19870965]

約数ペア:

[(1, 19870965), (3, 6623655), (5, 3974193), (9, 2207885), (15, 1324731), (23, 863955), (45, 441577), (69, 287985), (73, 272205), (115, 172791), (207, 95995), (219, 90735), (263, 75555), (345, 57597), (365, 54441), (657, 30245), (789, 25185), (1035, 19199), (1095, 18147), (1315, 15111), (1679, 11835), (2367, 8395), (3285, 6049), (3945, 5037)]