21259900

素因数分解:

$2^2\times 5^2\times {\mathrm{29}}^1\times {\mathrm{7331}}^1$

素因数の和:7374

約数の個数: 36

約数和(自身を含む): 47731320

約数和(自身を除く): 26471420

約数列:

[1, 2, 4, 5, 10, 20, 25, 29, 50, 58, 100, 116, 145, 290, 580, 725, 1450, 2900, 7331, 14662, 29324, 36655, 73310, 146620, 183275, 212599, 366550, 425198, 733100, 850396, 1062995, 2125990, 4251980, 5314975, 10629950, 21259900]

約数ペア:

[(1, 21259900), (2, 10629950), (4, 5314975), (5, 4251980), (10, 2125990), (20, 1062995), (25, 850396), (29, 733100), (50, 425198), (58, 366550), (100, 212599), (116, 183275), (145, 146620), (290, 73310), (580, 36655), (725, 29324), (1450, 14662), (2900, 7331)]