19821968

素因数分解:

$2^4\times {\mathrm{43}}^1\times {\mathrm{47}}^1\times {\mathrm{613}}^1$

素因数の和:711

約数の個数: 40

約数和(自身を含む): 40199808

約数和(自身を除く): 20377840

約数列:

[1, 2, 4, 8, 16, 43, 47, 86, 94, 172, 188, 344, 376, 613, 688, 752, 1226, 2021, 2452, 4042, 4904, 8084, 9808, 16168, 26359, 28811, 32336, 52718, 57622, 105436, 115244, 210872, 230488, 421744, 460976, 1238873, 2477746, 4955492, 9910984, 19821968]

約数ペア:

[(1, 19821968), (2, 9910984), (4, 4955492), (8, 2477746), (16, 1238873), (43, 460976), (47, 421744), (86, 230488), (94, 210872), (172, 115244), (188, 105436), (344, 57622), (376, 52718), (613, 32336), (688, 28811), (752, 26359), (1226, 16168), (2021, 9808), (2452, 8084), (4042, 4904)]