21855248

素因数分解:

$2^4\times {\mathrm{31}}^1\times {\mathrm{139}}^1\times {\mathrm{317}}^1$

素因数の和:495

約数の個数: 40

約数和(自身を含む): 44163840

約数和(自身を除く): 22308592

約数列:

[1, 2, 4, 8, 16, 31, 62, 124, 139, 248, 278, 317, 496, 556, 634, 1112, 1268, 2224, 2536, 4309, 5072, 8618, 9827, 17236, 19654, 34472, 39308, 44063, 68944, 78616, 88126, 157232, 176252, 352504, 705008, 1365953, 2731906, 5463812, 10927624, 21855248]

約数ペア:

[(1, 21855248), (2, 10927624), (4, 5463812), (8, 2731906), (16, 1365953), (31, 705008), (62, 352504), (124, 176252), (139, 157232), (248, 88126), (278, 78616), (317, 68944), (496, 44063), (556, 39308), (634, 34472), (1112, 19654), (1268, 17236), (2224, 9827), (2536, 8618), (4309, 5072)]