21004816

素因数分解:

$2^4\times 7^1\times {\mathrm{29}}^2\times {\mathrm{223}}^1$

素因数の和:296

約数の個数: 60

約数和(自身を含む): 48385792

約数和(自身を除く): 27380976

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 29, 56, 58, 112, 116, 203, 223, 232, 406, 446, 464, 812, 841, 892, 1561, 1624, 1682, 1784, 3122, 3248, 3364, 3568, 5887, 6244, 6467, 6728, 11774, 12488, 12934, 13456, 23548, 24976, 25868, 45269, 47096, 51736, 90538, 94192, 103472, 181076, 187543, 362152, 375086, 724304, 750172, 1312801, 1500344, 2625602, 3000688, 5251204, 10502408, 21004816]

約数ペア:

[(1, 21004816), (2, 10502408), (4, 5251204), (7, 3000688), (8, 2625602), (14, 1500344), (16, 1312801), (28, 750172), (29, 724304), (56, 375086), (58, 362152), (112, 187543), (116, 181076), (203, 103472), (223, 94192), (232, 90538), (406, 51736), (446, 47096), (464, 45269), (812, 25868), (841, 24976), (892, 23548), (1561, 13456), (1624, 12934), (1682, 12488), (1784, 11774), (3122, 6728), (3248, 6467), (3364, 6244), (3568, 5887)]