21508305

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{2251}}^1$

素因数の和:2286

約数の個数: 48

約数和(自身を含む): 43130304

約数和(自身を除く): 21621999

約数列:

[1, 3, 5, 7, 13, 15, 21, 35, 39, 49, 65, 91, 105, 147, 195, 245, 273, 455, 637, 735, 1365, 1911, 2251, 3185, 6753, 9555, 11255, 15757, 29263, 33765, 47271, 78785, 87789, 110299, 146315, 204841, 236355, 330897, 438945, 551495, 614523, 1024205, 1433887, 1654485, 3072615, 4301661, 7169435, 21508305]

約数ペア:

[(1, 21508305), (3, 7169435), (5, 4301661), (7, 3072615), (13, 1654485), (15, 1433887), (21, 1024205), (35, 614523), (39, 551495), (49, 438945), (65, 330897), (91, 236355), (105, 204841), (147, 146315), (195, 110299), (245, 87789), (273, 78785), (455, 47271), (637, 33765), (735, 29263), (1365, 15757), (1911, 11255), (2251, 9555), (3185, 6753)]