21687988

素因数分解:

$2^2\times 7^2\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{283}}^1$

素因数の和:341

約数の個数: 72

約数和(自身を含む): 48952512

約数和(自身を除く): 27264524

約数列:

[1, 2, 4, 7, 14, 17, 23, 28, 34, 46, 49, 68, 92, 98, 119, 161, 196, 238, 283, 322, 391, 476, 566, 644, 782, 833, 1127, 1132, 1564, 1666, 1981, 2254, 2737, 3332, 3962, 4508, 4811, 5474, 6509, 7924, 9622, 10948, 13018, 13867, 19159, 19244, 26036, 27734, 33677, 38318, 45563, 55468, 67354, 76636, 91126, 110653, 134708, 182252, 221306, 235739, 318941, 442612, 471478, 637882, 774571, 942956, 1275764, 1549142, 3098284, 5421997, 10843994, 21687988]

約数ペア:

[(1, 21687988), (2, 10843994), (4, 5421997), (7, 3098284), (14, 1549142), (17, 1275764), (23, 942956), (28, 774571), (34, 637882), (46, 471478), (49, 442612), (68, 318941), (92, 235739), (98, 221306), (119, 182252), (161, 134708), (196, 110653), (238, 91126), (283, 76636), (322, 67354), (391, 55468), (476, 45563), (566, 38318), (644, 33677), (782, 27734), (833, 26036), (1127, 19244), (1132, 19159), (1564, 13867), (1666, 13018), (1981, 10948), (2254, 9622), (2737, 7924), (3332, 6509), (3962, 5474), (4508, 4811)]