397040

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{709}}^1$

素因数の和:729

約数の個数: 40

約数和(自身を含む): 1056480

約数和(自身を除く): 659440

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 280, 560, 709, 1418, 2836, 3545, 4963, 5672, 7090, 9926, 11344, 14180, 19852, 24815, 28360, 39704, 49630, 56720, 79408, 99260, 198520, 397040]

約数ペア:

[(1, 397040), (2, 198520), (4, 99260), (5, 79408), (7, 56720), (8, 49630), (10, 39704), (14, 28360), (16, 24815), (20, 19852), (28, 14180), (35, 11344), (40, 9926), (56, 7090), (70, 5672), (80, 4963), (112, 3545), (140, 2836), (280, 1418), (560, 709)]