21989385

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{1433}}^1$

素因数の和:1486

約数の個数: 48

約数和(自身を含む): 42951168

約数和(自身を除く): 20961783

約数列:

[1, 3, 5, 9, 11, 15, 31, 33, 45, 55, 93, 99, 155, 165, 279, 341, 465, 495, 1023, 1395, 1433, 1705, 3069, 4299, 5115, 7165, 12897, 15345, 15763, 21495, 44423, 47289, 64485, 78815, 133269, 141867, 222115, 236445, 399807, 488653, 666345, 709335, 1465959, 1999035, 2443265, 4397877, 7329795, 21989385]

約数ペア:

[(1, 21989385), (3, 7329795), (5, 4397877), (9, 2443265), (11, 1999035), (15, 1465959), (31, 709335), (33, 666345), (45, 488653), (55, 399807), (93, 236445), (99, 222115), (155, 141867), (165, 133269), (279, 78815), (341, 64485), (465, 47289), (495, 44423), (1023, 21495), (1395, 15763), (1433, 15345), (1705, 12897), (3069, 7165), (4299, 5115)]