15660385

素因数分解:

$5^1\times {\mathrm{13}}^2\times {\mathrm{43}}^1\times {\mathrm{431}}^1$

素因数の和:505

約数の個数: 24

約数和(自身を含む): 20870784

約数和(自身を除く): 5210399

約数列:

[1, 5, 13, 43, 65, 169, 215, 431, 559, 845, 2155, 2795, 5603, 7267, 18533, 28015, 36335, 72839, 92665, 240929, 364195, 1204645, 3132077, 15660385]

約数ペア:

[(1, 15660385), (5, 3132077), (13, 1204645), (43, 364195), (65, 240929), (169, 92665), (215, 72839), (431, 36335), (559, 28015), (845, 18533), (2155, 7267), (2795, 5603)]