21396850

素因数分解:

$2^1\times 5^2\times {\mathrm{19}}^1\times {\mathrm{101}}^1\times {\mathrm{223}}^1$

素因数の和:355

約数の個数: 48

約数和(自身を含む): 42497280

約数和(自身を除く): 21100430

約数列:

[1, 2, 5, 10, 19, 25, 38, 50, 95, 101, 190, 202, 223, 446, 475, 505, 950, 1010, 1115, 1919, 2230, 2525, 3838, 4237, 5050, 5575, 8474, 9595, 11150, 19190, 21185, 22523, 42370, 45046, 47975, 95950, 105925, 112615, 211850, 225230, 427937, 563075, 855874, 1126150, 2139685, 4279370, 10698425, 21396850]

約数ペア:

[(1, 21396850), (2, 10698425), (5, 4279370), (10, 2139685), (19, 1126150), (25, 855874), (38, 563075), (50, 427937), (95, 225230), (101, 211850), (190, 112615), (202, 105925), (223, 95950), (446, 47975), (475, 45046), (505, 42370), (950, 22523), (1010, 21185), (1115, 19190), (1919, 11150), (2230, 9595), (2525, 8474), (3838, 5575), (4237, 5050)]