21675784

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{43}}^1\times {\mathrm{131}}^1$

素因数の和:230

約数の個数: 64

約数和(自身を含む): 46347840

約数和(自身を除く): 24672056

約数列:

[1, 2, 4, 8, 13, 26, 37, 43, 52, 74, 86, 104, 131, 148, 172, 262, 296, 344, 481, 524, 559, 962, 1048, 1118, 1591, 1703, 1924, 2236, 3182, 3406, 3848, 4472, 4847, 5633, 6364, 6812, 9694, 11266, 12728, 13624, 19388, 20683, 22532, 38776, 41366, 45064, 63011, 73229, 82732, 126022, 146458, 165464, 208421, 252044, 292916, 416842, 504088, 585832, 833684, 1667368, 2709473, 5418946, 10837892, 21675784]

約数ペア:

[(1, 21675784), (2, 10837892), (4, 5418946), (8, 2709473), (13, 1667368), (26, 833684), (37, 585832), (43, 504088), (52, 416842), (74, 292916), (86, 252044), (104, 208421), (131, 165464), (148, 146458), (172, 126022), (262, 82732), (296, 73229), (344, 63011), (481, 45064), (524, 41366), (559, 38776), (962, 22532), (1048, 20683), (1118, 19388), (1591, 13624), (1703, 12728), (1924, 11266), (2236, 9694), (3182, 6812), (3406, 6364), (3848, 5633), (4472, 4847)]