81870165

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{349}}^1\times {\mathrm{401}}^1$

素因数の和:774

約数の個数: 48

約数和(自身を含む): 153644400

約数和(自身を除く): 71774235

約数列:

[1, 3, 5, 9, 13, 15, 39, 45, 65, 117, 195, 349, 401, 585, 1047, 1203, 1745, 2005, 3141, 3609, 4537, 5213, 5235, 6015, 13611, 15639, 15705, 18045, 22685, 26065, 40833, 46917, 68055, 78195, 139949, 204165, 234585, 419847, 699745, 1259541, 1819337, 2099235, 5458011, 6297705, 9096685, 16374033, 27290055, 81870165]

約数ペア:

[(1, 81870165), (3, 27290055), (5, 16374033), (9, 9096685), (13, 6297705), (15, 5458011), (39, 2099235), (45, 1819337), (65, 1259541), (117, 699745), (195, 419847), (349, 234585), (401, 204165), (585, 139949), (1047, 78195), (1203, 68055), (1745, 46917), (2005, 40833), (3141, 26065), (3609, 22685), (4537, 18045), (5213, 15705), (5235, 15639), (6015, 13611)]