398049320

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{242713}}^1$

素因数の和:242765

約数の個数: 32

約数和(自身を含む): 917458920

約数和(自身を除く): 519409600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 242713, 485426, 970852, 1213565, 1941704, 2427130, 4854260, 9708520, 9951233, 19902466, 39804932, 49756165, 79609864, 99512330, 199024660, 398049320]

約数ペア:

[(1, 398049320), (2, 199024660), (4, 99512330), (5, 79609864), (8, 49756165), (10, 39804932), (20, 19902466), (40, 9951233), (41, 9708520), (82, 4854260), (164, 2427130), (205, 1941704), (328, 1213565), (410, 970852), (820, 485426), (1640, 242713)]