331345720

素因数分解:

$2^3\times 5^1\times {\mathrm{641}}^1\times {\mathrm{12923}}^1$

素因数の和:13575

約数の個数: 32

約数和(自身を含む): 746748720

約数和(自身を除く): 415403000

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 641, 1282, 2564, 3205, 5128, 6410, 12820, 12923, 25640, 25846, 51692, 64615, 103384, 129230, 258460, 516920, 8283643, 16567286, 33134572, 41418215, 66269144, 82836430, 165672860, 331345720]

約数ペア:

[(1, 331345720), (2, 165672860), (4, 82836430), (5, 66269144), (8, 41418215), (10, 33134572), (20, 16567286), (40, 8283643), (641, 516920), (1282, 258460), (2564, 129230), (3205, 103384), (5128, 64615), (6410, 51692), (12820, 25846), (12923, 25640)]