21988792

素因数分解:

$2^3\times 7^1\times {\mathrm{41}}^1\times {\mathrm{61}}^1\times {\mathrm{157}}^1$

素因数の和:272

約数の個数: 64

約数和(自身を含む): 49371840

約数和(自身を除く): 27383048

約数列:

[1, 2, 4, 7, 8, 14, 28, 41, 56, 61, 82, 122, 157, 164, 244, 287, 314, 328, 427, 488, 574, 628, 854, 1099, 1148, 1256, 1708, 2198, 2296, 2501, 3416, 4396, 5002, 6437, 8792, 9577, 10004, 12874, 17507, 19154, 20008, 25748, 35014, 38308, 45059, 51496, 67039, 70028, 76616, 90118, 134078, 140056, 180236, 268156, 360472, 392657, 536312, 785314, 1570628, 2748599, 3141256, 5497198, 10994396, 21988792]

約数ペア:

[(1, 21988792), (2, 10994396), (4, 5497198), (7, 3141256), (8, 2748599), (14, 1570628), (28, 785314), (41, 536312), (56, 392657), (61, 360472), (82, 268156), (122, 180236), (157, 140056), (164, 134078), (244, 90118), (287, 76616), (314, 70028), (328, 67039), (427, 51496), (488, 45059), (574, 38308), (628, 35014), (854, 25748), (1099, 20008), (1148, 19154), (1256, 17507), (1708, 12874), (2198, 10004), (2296, 9577), (2501, 8792), (3416, 6437), (4396, 5002)]