21307375

素因数分解:

$5^3\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{271}}^1$

素因数の和:340

約数の個数: 32

約数和(自身を含む): 29023488

約数和(自身を除く): 7716113

約数列:

[1, 5, 17, 25, 37, 85, 125, 185, 271, 425, 629, 925, 1355, 2125, 3145, 4607, 4625, 6775, 10027, 15725, 23035, 33875, 50135, 78625, 115175, 170459, 250675, 575875, 852295, 1253375, 4261475, 21307375]

約数ペア:

[(1, 21307375), (5, 4261475), (17, 1253375), (25, 852295), (37, 575875), (85, 250675), (125, 170459), (185, 115175), (271, 78625), (425, 50135), (629, 33875), (925, 23035), (1355, 15725), (2125, 10027), (3145, 6775), (4607, 4625)]