21382250

素因数分解:

$2^1\times 5^3\times {\mathrm{31}}^2\times {\mathrm{89}}^1$

素因数の和:168

約数の個数: 48

約数和(自身を含む): 41825160

約数和(自身を除く): 20442910

約数列:

[1, 2, 5, 10, 25, 31, 50, 62, 89, 125, 155, 178, 250, 310, 445, 775, 890, 961, 1550, 1922, 2225, 2759, 3875, 4450, 4805, 5518, 7750, 9610, 11125, 13795, 22250, 24025, 27590, 48050, 68975, 85529, 120125, 137950, 171058, 240250, 344875, 427645, 689750, 855290, 2138225, 4276450, 10691125, 21382250]

約数ペア:

[(1, 21382250), (2, 10691125), (5, 4276450), (10, 2138225), (25, 855290), (31, 689750), (50, 427645), (62, 344875), (89, 240250), (125, 171058), (155, 137950), (178, 120125), (250, 85529), (310, 68975), (445, 48050), (775, 27590), (890, 24025), (961, 22250), (1550, 13795), (1922, 11125), (2225, 9610), (2759, 7750), (3875, 5518), (4450, 4805)]