21138750

素因数分解:

$2^1\times 3^2\times 5^4\times {\mathrm{1879}}^1$

素因数の和:1907

約数の個数: 60

約数和(自身を含む): 57262920

約数和(自身を除く): 36124170

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 18, 25, 30, 45, 50, 75, 90, 125, 150, 225, 250, 375, 450, 625, 750, 1125, 1250, 1875, 1879, 2250, 3750, 3758, 5625, 5637, 9395, 11250, 11274, 16911, 18790, 28185, 33822, 46975, 56370, 84555, 93950, 140925, 169110, 234875, 281850, 422775, 469750, 704625, 845550, 1174375, 1409250, 2113875, 2348750, 3523125, 4227750, 7046250, 10569375, 21138750]

約数ペア:

[(1, 21138750), (2, 10569375), (3, 7046250), (5, 4227750), (6, 3523125), (9, 2348750), (10, 2113875), (15, 1409250), (18, 1174375), (25, 845550), (30, 704625), (45, 469750), (50, 422775), (75, 281850), (90, 234875), (125, 169110), (150, 140925), (225, 93950), (250, 84555), (375, 56370), (450, 46975), (625, 33822), (750, 28185), (1125, 18790), (1250, 16911), (1875, 11274), (1879, 11250), (2250, 9395), (3750, 5637), (3758, 5625)]