278804560

素因数分解:

$2^4\times 5^1\times {\mathrm{109}}^1\times {\mathrm{31973}}^1$

素因数の和:32095

約数の個数: 40

約数和(自身を含む): 654188040

約数和(自身を除く): 375383480

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 109, 218, 436, 545, 872, 1090, 1744, 2180, 4360, 8720, 31973, 63946, 127892, 159865, 255784, 319730, 511568, 639460, 1278920, 2557840, 3485057, 6970114, 13940228, 17425285, 27880456, 34850570, 55760912, 69701140, 139402280, 278804560]

約数ペア:

[(1, 278804560), (2, 139402280), (4, 69701140), (5, 55760912), (8, 34850570), (10, 27880456), (16, 17425285), (20, 13940228), (40, 6970114), (80, 3485057), (109, 2557840), (218, 1278920), (436, 639460), (545, 511568), (872, 319730), (1090, 255784), (1744, 159865), (2180, 127892), (4360, 63946), (8720, 31973)]