19489145

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{71}}^1\times {\mathrm{103}}^1$

素因数の和:233

約数の個数: 32

約数和(自身を含む): 26417664

約数和(自身を除く): 6928519

約数列:

[1, 5, 13, 41, 65, 71, 103, 205, 355, 515, 533, 923, 1339, 2665, 2911, 4223, 4615, 6695, 7313, 14555, 21115, 36565, 37843, 54899, 95069, 189215, 274495, 299833, 475345, 1499165, 3897829, 19489145]

約数ペア:

[(1, 19489145), (5, 3897829), (13, 1499165), (41, 475345), (65, 299833), (71, 274495), (103, 189215), (205, 95069), (355, 54899), (515, 37843), (533, 36565), (923, 21115), (1339, 14555), (2665, 7313), (2911, 6695), (4223, 4615)]