21259672

素因数分解:

$2^3\times 7^1\times {\mathrm{71}}^1\times {\mathrm{5347}}^1$

素因数の和:5431

約数の個数: 32

約数和(自身を含む): 46206720

約数和(自身を除く): 24947048

約数列:

[1, 2, 4, 7, 8, 14, 28, 56, 71, 142, 284, 497, 568, 994, 1988, 3976, 5347, 10694, 21388, 37429, 42776, 74858, 149716, 299432, 379637, 759274, 1518548, 2657459, 3037096, 5314918, 10629836, 21259672]

約数ペア:

[(1, 21259672), (2, 10629836), (4, 5314918), (7, 3037096), (8, 2657459), (14, 1518548), (28, 759274), (56, 379637), (71, 299432), (142, 149716), (284, 74858), (497, 42776), (568, 37429), (994, 21388), (1988, 10694), (3976, 5347)]