21747284

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{73}}^1\times {\mathrm{337}}^1$

素因数の和:444

約数の個数: 48

約数和(自身を含む): 44121168

約数和(自身を除く): 22373884

約数列:

[1, 2, 4, 13, 17, 26, 34, 52, 68, 73, 146, 221, 292, 337, 442, 674, 884, 949, 1241, 1348, 1898, 2482, 3796, 4381, 4964, 5729, 8762, 11458, 16133, 17524, 22916, 24601, 32266, 49202, 64532, 74477, 98404, 148954, 297908, 319813, 418217, 639626, 836434, 1279252, 1672868, 5436821, 10873642, 21747284]

約数ペア:

[(1, 21747284), (2, 10873642), (4, 5436821), (13, 1672868), (17, 1279252), (26, 836434), (34, 639626), (52, 418217), (68, 319813), (73, 297908), (146, 148954), (221, 98404), (292, 74477), (337, 64532), (442, 49202), (674, 32266), (884, 24601), (949, 22916), (1241, 17524), (1348, 16133), (1898, 11458), (2482, 8762), (3796, 5729), (4381, 4964)]