21787700

素因数分解:

$2^2\times 5^2\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{683}}^1$

素因数の和:737

約数の個数: 72

約数和(自身を含む): 53434080

約数和(自身を除く): 31646380

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 25, 29, 44, 50, 55, 58, 100, 110, 116, 145, 220, 275, 290, 319, 550, 580, 638, 683, 725, 1100, 1276, 1366, 1450, 1595, 2732, 2900, 3190, 3415, 6380, 6830, 7513, 7975, 13660, 15026, 15950, 17075, 19807, 30052, 31900, 34150, 37565, 39614, 68300, 75130, 79228, 99035, 150260, 187825, 198070, 217877, 375650, 396140, 435754, 495175, 751300, 871508, 990350, 1089385, 1980700, 2178770, 4357540, 5446925, 10893850, 21787700]

約数ペア:

[(1, 21787700), (2, 10893850), (4, 5446925), (5, 4357540), (10, 2178770), (11, 1980700), (20, 1089385), (22, 990350), (25, 871508), (29, 751300), (44, 495175), (50, 435754), (55, 396140), (58, 375650), (100, 217877), (110, 198070), (116, 187825), (145, 150260), (220, 99035), (275, 79228), (290, 75130), (319, 68300), (550, 39614), (580, 37565), (638, 34150), (683, 31900), (725, 30052), (1100, 19807), (1276, 17075), (1366, 15950), (1450, 15026), (1595, 13660), (2732, 7975), (2900, 7513), (3190, 6830), (3415, 6380)]