21689756

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{107}}^1\times {\mathrm{271}}^1$

素因数の和:410

約数の個数: 48

約数和(自身を含む): 44416512

約数和(自身を除く): 22726756

約数列:

[1, 2, 4, 11, 17, 22, 34, 44, 68, 107, 187, 214, 271, 374, 428, 542, 748, 1084, 1177, 1819, 2354, 2981, 3638, 4607, 4708, 5962, 7276, 9214, 11924, 18428, 20009, 28997, 40018, 50677, 57994, 80036, 101354, 115988, 202708, 318967, 492949, 637934, 985898, 1275868, 1971796, 5422439, 10844878, 21689756]

約数ペア:

[(1, 21689756), (2, 10844878), (4, 5422439), (11, 1971796), (17, 1275868), (22, 985898), (34, 637934), (44, 492949), (68, 318967), (107, 202708), (187, 115988), (214, 101354), (271, 80036), (374, 57994), (428, 50677), (542, 40018), (748, 28997), (1084, 20009), (1177, 18428), (1819, 11924), (2354, 9214), (2981, 7276), (3638, 5962), (4607, 4708)]