20769980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13487}}^1$

素因数の和:13514

約数の個数: 48

約数和(自身を含む): 54383616

約数和(自身を除く): 33613636

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 44, 55, 70, 77, 110, 140, 154, 220, 308, 385, 770, 1540, 13487, 26974, 53948, 67435, 94409, 134870, 148357, 188818, 269740, 296714, 377636, 472045, 593428, 741785, 944090, 1038499, 1483570, 1888180, 2076998, 2967140, 4153996, 5192495, 10384990, 20769980]

約数ペア:

[(1, 20769980), (2, 10384990), (4, 5192495), (5, 4153996), (7, 2967140), (10, 2076998), (11, 1888180), (14, 1483570), (20, 1038499), (22, 944090), (28, 741785), (35, 593428), (44, 472045), (55, 377636), (70, 296714), (77, 269740), (110, 188818), (140, 148357), (154, 134870), (220, 94409), (308, 67435), (385, 53948), (770, 26974), (1540, 13487)]