20739400

素因数分解:

$2^3\times 5^2\times {\mathrm{11}}^2\times {\mathrm{857}}^1$

素因数の和:895

約数の個数: 72

約数和(自身を含む): 53063010

約数和(自身を除く): 32323610

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 25, 40, 44, 50, 55, 88, 100, 110, 121, 200, 220, 242, 275, 440, 484, 550, 605, 857, 968, 1100, 1210, 1714, 2200, 2420, 3025, 3428, 4285, 4840, 6050, 6856, 8570, 9427, 12100, 17140, 18854, 21425, 24200, 34280, 37708, 42850, 47135, 75416, 85700, 94270, 103697, 171400, 188540, 207394, 235675, 377080, 414788, 471350, 518485, 829576, 942700, 1036970, 1885400, 2073940, 2592425, 4147880, 5184850, 10369700, 20739400]

約数ペア:

[(1, 20739400), (2, 10369700), (4, 5184850), (5, 4147880), (8, 2592425), (10, 2073940), (11, 1885400), (20, 1036970), (22, 942700), (25, 829576), (40, 518485), (44, 471350), (50, 414788), (55, 377080), (88, 235675), (100, 207394), (110, 188540), (121, 171400), (200, 103697), (220, 94270), (242, 85700), (275, 75416), (440, 47135), (484, 42850), (550, 37708), (605, 34280), (857, 24200), (968, 21425), (1100, 18854), (1210, 17140), (1714, 12100), (2200, 9427), (2420, 8570), (3025, 6856), (3428, 6050), (4285, 4840)]