21205730

素因数分解:

$2^1\times 5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{3329}}^1$

素因数の和:3363

約数の個数: 48

約数和(自身を含む): 47832120

約数和(自身を除く): 26626390

約数列:

[1, 2, 5, 7, 10, 13, 14, 26, 35, 49, 65, 70, 91, 98, 130, 182, 245, 455, 490, 637, 910, 1274, 3185, 3329, 6370, 6658, 16645, 23303, 33290, 43277, 46606, 86554, 116515, 163121, 216385, 233030, 302939, 326242, 432770, 605878, 815605, 1514695, 1631210, 2120573, 3029390, 4241146, 10602865, 21205730]

約数ペア:

[(1, 21205730), (2, 10602865), (5, 4241146), (7, 3029390), (10, 2120573), (13, 1631210), (14, 1514695), (26, 815605), (35, 605878), (49, 432770), (65, 326242), (70, 302939), (91, 233030), (98, 216385), (130, 163121), (182, 116515), (245, 86554), (455, 46606), (490, 43277), (637, 33290), (910, 23303), (1274, 16645), (3185, 6658), (3329, 6370)]