21497888

素因数分解:

$2^5\times {\mathrm{37}}^1\times {\mathrm{67}}^1\times {\mathrm{271}}^1$

素因数の和:385

約数の個数: 48

約数和(自身を含む): 44279424

約数和(自身を除く): 22781536

約数列:

[1, 2, 4, 8, 16, 32, 37, 67, 74, 134, 148, 268, 271, 296, 536, 542, 592, 1072, 1084, 1184, 2144, 2168, 2479, 4336, 4958, 8672, 9916, 10027, 18157, 19832, 20054, 36314, 39664, 40108, 72628, 79328, 80216, 145256, 160432, 290512, 320864, 581024, 671809, 1343618, 2687236, 5374472, 10748944, 21497888]

約数ペア:

[(1, 21497888), (2, 10748944), (4, 5374472), (8, 2687236), (16, 1343618), (32, 671809), (37, 581024), (67, 320864), (74, 290512), (134, 160432), (148, 145256), (268, 80216), (271, 79328), (296, 72628), (536, 40108), (542, 39664), (592, 36314), (1072, 20054), (1084, 19832), (1184, 18157), (2144, 10027), (2168, 9916), (2479, 8672), (4336, 4958)]