18874040

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^2\times {\mathrm{491}}^1$

素因数の和:564

約数の個数: 48

約数和(自身を含む): 43970040

約数和(自身を除く): 25096000

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 248, 310, 491, 620, 961, 982, 1240, 1922, 1964, 2455, 3844, 3928, 4805, 4910, 7688, 9610, 9820, 15221, 19220, 19640, 30442, 38440, 60884, 76105, 121768, 152210, 304420, 471851, 608840, 943702, 1887404, 2359255, 3774808, 4718510, 9437020, 18874040]

約数ペア:

[(1, 18874040), (2, 9437020), (4, 4718510), (5, 3774808), (8, 2359255), (10, 1887404), (20, 943702), (31, 608840), (40, 471851), (62, 304420), (124, 152210), (155, 121768), (248, 76105), (310, 60884), (491, 38440), (620, 30442), (961, 19640), (982, 19220), (1240, 15221), (1922, 9820), (1964, 9610), (2455, 7688), (3844, 4910), (3928, 4805)]