389968280

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{749939}}^1$

素因数の和:749963

約数の個数: 32

約数和(自身を含む): 944924400

約数和(自身を除く): 554956120

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 749939, 1499878, 2999756, 3749695, 5999512, 7499390, 9749207, 14998780, 19498414, 29997560, 38996828, 48746035, 77993656, 97492070, 194984140, 389968280]

約数ペア:

[(1, 389968280), (2, 194984140), (4, 97492070), (5, 77993656), (8, 48746035), (10, 38996828), (13, 29997560), (20, 19498414), (26, 14998780), (40, 9749207), (52, 7499390), (65, 5999512), (104, 3749695), (130, 2999756), (260, 1499878), (520, 749939)]