20171680

素因数分解:

$2^5\times 5^1\times {\mathrm{139}}^1\times {\mathrm{907}}^1$

素因数の和:1061

約数の個数: 48

約数和(自身を含む): 48051360

約数和(自身を除く): 27879680

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 139, 160, 278, 556, 695, 907, 1112, 1390, 1814, 2224, 2780, 3628, 4448, 4535, 5560, 7256, 9070, 11120, 14512, 18140, 22240, 29024, 36280, 72560, 126073, 145120, 252146, 504292, 630365, 1008584, 1260730, 2017168, 2521460, 4034336, 5042920, 10085840, 20171680]

約数ペア:

[(1, 20171680), (2, 10085840), (4, 5042920), (5, 4034336), (8, 2521460), (10, 2017168), (16, 1260730), (20, 1008584), (32, 630365), (40, 504292), (80, 252146), (139, 145120), (160, 126073), (278, 72560), (556, 36280), (695, 29024), (907, 22240), (1112, 18140), (1390, 14512), (1814, 11120), (2224, 9070), (2780, 7256), (3628, 5560), (4448, 4535)]