678920

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{1543}}^1$

素因数の和:1565

約数の個数: 32

約数和(自身を含む): 1667520

約数和(自身を除く): 988600

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 1543, 3086, 6172, 7715, 12344, 15430, 16973, 30860, 33946, 61720, 67892, 84865, 135784, 169730, 339460, 678920]

約数ペア:

[(1, 678920), (2, 339460), (4, 169730), (5, 135784), (8, 84865), (10, 67892), (11, 61720), (20, 33946), (22, 30860), (40, 16973), (44, 15430), (55, 12344), (88, 7715), (110, 6172), (220, 3086), (440, 1543)]