828440

素因数分解:

$2^3\times 5^1\times {\mathrm{139}}^1\times {\mathrm{149}}^1$

素因数の和:299

約数の個数: 32

約数和(自身を含む): 1890000

約数和(自身を除く): 1061560

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 139, 149, 278, 298, 556, 596, 695, 745, 1112, 1192, 1390, 1490, 2780, 2980, 5560, 5960, 20711, 41422, 82844, 103555, 165688, 207110, 414220, 828440]

約数ペア:

[(1, 828440), (2, 414220), (4, 207110), (5, 165688), (8, 103555), (10, 82844), (20, 41422), (40, 20711), (139, 5960), (149, 5560), (278, 2980), (298, 2780), (556, 1490), (596, 1390), (695, 1192), (745, 1112)]