20671515

素因数分解:

$3^2\times 5^1\times {\mathrm{149}}^1\times {\mathrm{3083}}^1$

素因数の和:3243

約数の個数: 24

約数和(自身を含む): 36082800

約数和(自身を除く): 15411285

約数列:

[1, 3, 5, 9, 15, 45, 149, 447, 745, 1341, 2235, 3083, 6705, 9249, 15415, 27747, 46245, 138735, 459367, 1378101, 2296835, 4134303, 6890505, 20671515]

約数ペア:

[(1, 20671515), (3, 6890505), (5, 4134303), (9, 2296835), (15, 1378101), (45, 459367), (149, 138735), (447, 46245), (745, 27747), (1341, 15415), (2235, 9249), (3083, 6705)]