21156135

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{1409}}^1$

素因数の和:1448

約数の個数: 64

約数和(自身を含む): 45480960

約数和(自身を除く): 24324825

約数列:

[1, 3, 5, 7, 11, 13, 15, 21, 33, 35, 39, 55, 65, 77, 91, 105, 143, 165, 195, 231, 273, 385, 429, 455, 715, 1001, 1155, 1365, 1409, 2145, 3003, 4227, 5005, 7045, 9863, 15015, 15499, 18317, 21135, 29589, 46497, 49315, 54951, 77495, 91585, 108493, 128219, 147945, 201487, 232485, 274755, 325479, 384657, 542465, 604461, 641095, 1007435, 1410409, 1627395, 1923285, 3022305, 4231227, 7052045, 21156135]

約数ペア:

[(1, 21156135), (3, 7052045), (5, 4231227), (7, 3022305), (11, 1923285), (13, 1627395), (15, 1410409), (21, 1007435), (33, 641095), (35, 604461), (39, 542465), (55, 384657), (65, 325479), (77, 274755), (91, 232485), (105, 201487), (143, 147945), (165, 128219), (195, 108493), (231, 91585), (273, 77495), (385, 54951), (429, 49315), (455, 46497), (715, 29589), (1001, 21135), (1155, 18317), (1365, 15499), (1409, 15015), (2145, 9863), (3003, 7045), (4227, 5005)]