21504195

素因数分解:

$3^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{79}}^1\times {\mathrm{263}}^1$

素因数の和:376

約数の個数: 48

約数和(自身を含む): 39536640

約数和(自身を除く): 18032445

約数列:

[1, 3, 5, 9, 15, 23, 45, 69, 79, 115, 207, 237, 263, 345, 395, 711, 789, 1035, 1185, 1315, 1817, 2367, 3555, 3945, 5451, 6049, 9085, 11835, 16353, 18147, 20777, 27255, 30245, 54441, 62331, 81765, 90735, 103885, 186993, 272205, 311655, 477871, 934965, 1433613, 2389355, 4300839, 7168065, 21504195]

約数ペア:

[(1, 21504195), (3, 7168065), (5, 4300839), (9, 2389355), (15, 1433613), (23, 934965), (45, 477871), (69, 311655), (79, 272205), (115, 186993), (207, 103885), (237, 90735), (263, 81765), (345, 62331), (395, 54441), (711, 30245), (789, 27255), (1035, 20777), (1185, 18147), (1315, 16353), (1817, 11835), (2367, 9085), (3555, 6049), (3945, 5451)]