21782750

素因数分解:

$2^1\times 5^3\times {\mathrm{11}}^1\times {\mathrm{89}}^2$

素因数の和:206

約数の個数: 48

約数和(自身を含む): 44989776

約数和(自身を除く): 23207026

約数列:

[1, 2, 5, 10, 11, 22, 25, 50, 55, 89, 110, 125, 178, 250, 275, 445, 550, 890, 979, 1375, 1958, 2225, 2750, 4450, 4895, 7921, 9790, 11125, 15842, 22250, 24475, 39605, 48950, 79210, 87131, 122375, 174262, 198025, 244750, 396050, 435655, 871310, 990125, 1980250, 2178275, 4356550, 10891375, 21782750]

約数ペア:

[(1, 21782750), (2, 10891375), (5, 4356550), (10, 2178275), (11, 1980250), (22, 990125), (25, 871310), (50, 435655), (55, 396050), (89, 244750), (110, 198025), (125, 174262), (178, 122375), (250, 87131), (275, 79210), (445, 48950), (550, 39605), (890, 24475), (979, 22250), (1375, 15842), (1958, 11125), (2225, 9790), (2750, 7921), (4450, 4895)]