21978544

素因数分解:

$2^4\times 7^1\times {\mathrm{61}}^1\times {\mathrm{3217}}^1$

素因数の和:3293

約数の個数: 40

約数和(自身を含む): 49479968

約数和(自身を除く): 27501424

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 56, 61, 112, 122, 244, 427, 488, 854, 976, 1708, 3217, 3416, 6434, 6832, 12868, 22519, 25736, 45038, 51472, 90076, 180152, 196237, 360304, 392474, 784948, 1373659, 1569896, 2747318, 3139792, 5494636, 10989272, 21978544]

約数ペア:

[(1, 21978544), (2, 10989272), (4, 5494636), (7, 3139792), (8, 2747318), (14, 1569896), (16, 1373659), (28, 784948), (56, 392474), (61, 360304), (112, 196237), (122, 180152), (244, 90076), (427, 51472), (488, 45038), (854, 25736), (976, 22519), (1708, 12868), (3217, 6832), (3416, 6434)]