21965500

素因数分解:

$2^2\times 5^3\times {\mathrm{197}}^1\times {\mathrm{223}}^1$

素因数の和:439

約数の個数: 48

約数和(自身を含む): 48432384

約数和(自身を除く): 26466884

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 125, 197, 223, 250, 394, 446, 500, 788, 892, 985, 1115, 1970, 2230, 3940, 4460, 4925, 5575, 9850, 11150, 19700, 22300, 24625, 27875, 43931, 49250, 55750, 87862, 98500, 111500, 175724, 219655, 439310, 878620, 1098275, 2196550, 4393100, 5491375, 10982750, 21965500]

約数ペア:

[(1, 21965500), (2, 10982750), (4, 5491375), (5, 4393100), (10, 2196550), (20, 1098275), (25, 878620), (50, 439310), (100, 219655), (125, 175724), (197, 111500), (223, 98500), (250, 87862), (394, 55750), (446, 49250), (500, 43931), (788, 27875), (892, 24625), (985, 22300), (1115, 19700), (1970, 11150), (2230, 9850), (3940, 5575), (4460, 4925)]