21857715

素因数分解:

$3^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{359}}^1$

素因数の和:425

約数の個数: 64

約数和(自身を含む): 43545600

約数和(自身を除く): 21687885

約数列:

[1, 3, 5, 9, 11, 15, 27, 33, 41, 45, 55, 99, 123, 135, 165, 205, 297, 359, 369, 451, 495, 615, 1077, 1107, 1353, 1485, 1795, 1845, 2255, 3231, 3949, 4059, 5385, 5535, 6765, 9693, 11847, 12177, 14719, 16155, 19745, 20295, 35541, 44157, 48465, 59235, 60885, 73595, 106623, 132471, 161909, 177705, 220785, 397413, 485727, 533115, 662355, 809545, 1457181, 1987065, 2428635, 4371543, 7285905, 21857715]

約数ペア:

[(1, 21857715), (3, 7285905), (5, 4371543), (9, 2428635), (11, 1987065), (15, 1457181), (27, 809545), (33, 662355), (41, 533115), (45, 485727), (55, 397413), (99, 220785), (123, 177705), (135, 161909), (165, 132471), (205, 106623), (297, 73595), (359, 60885), (369, 59235), (451, 48465), (495, 44157), (615, 35541), (1077, 20295), (1107, 19745), (1353, 16155), (1485, 14719), (1795, 12177), (1845, 11847), (2255, 9693), (3231, 6765), (3949, 5535), (4059, 5385)]