21045976

素因数分解:

$2^3\times 7^1\times {\mathrm{61}}^2\times {\mathrm{101}}^1$

素因数の和:236

約数の個数: 48

約数和(自身を含む): 46303920

約数和(自身を除く): 25257944

約数列:

[1, 2, 4, 7, 8, 14, 28, 56, 61, 101, 122, 202, 244, 404, 427, 488, 707, 808, 854, 1414, 1708, 2828, 3416, 3721, 5656, 6161, 7442, 12322, 14884, 24644, 26047, 29768, 43127, 49288, 52094, 86254, 104188, 172508, 208376, 345016, 375821, 751642, 1503284, 2630747, 3006568, 5261494, 10522988, 21045976]

約数ペア:

[(1, 21045976), (2, 10522988), (4, 5261494), (7, 3006568), (8, 2630747), (14, 1503284), (28, 751642), (56, 375821), (61, 345016), (101, 208376), (122, 172508), (202, 104188), (244, 86254), (404, 52094), (427, 49288), (488, 43127), (707, 29768), (808, 26047), (854, 24644), (1414, 14884), (1708, 12322), (2828, 7442), (3416, 6161), (3721, 5656)]