21268005

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{157}}^1\times {\mathrm{821}}^1$

素因数の和:997

約数の個数: 32

約数和(自身を含む): 37404288

約数和(自身を除く): 16136283

約数列:

[1, 3, 5, 11, 15, 33, 55, 157, 165, 471, 785, 821, 1727, 2355, 2463, 4105, 5181, 8635, 9031, 12315, 25905, 27093, 45155, 128897, 135465, 386691, 644485, 1417867, 1933455, 4253601, 7089335, 21268005]

約数ペア:

[(1, 21268005), (3, 7089335), (5, 4253601), (11, 1933455), (15, 1417867), (33, 644485), (55, 386691), (157, 135465), (165, 128897), (471, 45155), (785, 27093), (821, 25905), (1727, 12315), (2355, 9031), (2463, 8635), (4105, 5181)]