645744280

素因数分解:

$2^3\times 5^1\times {\mathrm{47}}^1\times {\mathrm{343481}}^1$

素因数の和:343539

約数の個数: 32

約数和(自身を含む): 1483842240

約数和(自身を除く): 838097960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 47, 94, 188, 235, 376, 470, 940, 1880, 343481, 686962, 1373924, 1717405, 2747848, 3434810, 6869620, 13739240, 16143607, 32287214, 64574428, 80718035, 129148856, 161436070, 322872140, 645744280]

約数ペア:

[(1, 645744280), (2, 322872140), (4, 161436070), (5, 129148856), (8, 80718035), (10, 64574428), (20, 32287214), (40, 16143607), (47, 13739240), (94, 6869620), (188, 3434810), (235, 2747848), (376, 1717405), (470, 1373924), (940, 686962), (1880, 343481)]