20217285

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{47}}^1\times {\mathrm{79}}^1$

素因数の和:159

約数の個数: 72

約数和(自身を含む): 39836160

約数和(自身を除く): 19618875

約数列:

[1, 3, 5, 9, 11, 15, 33, 45, 47, 55, 79, 99, 121, 141, 165, 235, 237, 363, 395, 423, 495, 517, 605, 705, 711, 869, 1089, 1185, 1551, 1815, 2115, 2585, 2607, 3555, 3713, 4345, 4653, 5445, 5687, 7755, 7821, 9559, 11139, 13035, 17061, 18565, 23265, 28435, 28677, 33417, 39105, 40843, 47795, 51183, 55695, 85305, 86031, 122529, 143385, 167085, 204215, 255915, 367587, 430155, 449273, 612645, 1347819, 1837935, 2246365, 4043457, 6739095, 20217285]

約数ペア:

[(1, 20217285), (3, 6739095), (5, 4043457), (9, 2246365), (11, 1837935), (15, 1347819), (33, 612645), (45, 449273), (47, 430155), (55, 367587), (79, 255915), (99, 204215), (121, 167085), (141, 143385), (165, 122529), (235, 86031), (237, 85305), (363, 55695), (395, 51183), (423, 47795), (495, 40843), (517, 39105), (605, 33417), (705, 28677), (711, 28435), (869, 23265), (1089, 18565), (1185, 17061), (1551, 13035), (1815, 11139), (2115, 9559), (2585, 7821), (2607, 7755), (3555, 5687), (3713, 5445), (4345, 4653)]