19931680

素因数分解:

$2^5\times 5^1\times {\mathrm{347}}^1\times {\mathrm{359}}^1$

素因数の和:721

約数の個数: 48

約数和(自身を含む): 47355840

約数和(自身を除く): 27424160

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 347, 359, 694, 718, 1388, 1436, 1735, 1795, 2776, 2872, 3470, 3590, 5552, 5744, 6940, 7180, 11104, 11488, 13880, 14360, 27760, 28720, 55520, 57440, 124573, 249146, 498292, 622865, 996584, 1245730, 1993168, 2491460, 3986336, 4982920, 9965840, 19931680]

約数ペア:

[(1, 19931680), (2, 9965840), (4, 4982920), (5, 3986336), (8, 2491460), (10, 1993168), (16, 1245730), (20, 996584), (32, 622865), (40, 498292), (80, 249146), (160, 124573), (347, 57440), (359, 55520), (694, 28720), (718, 27760), (1388, 14360), (1436, 13880), (1735, 11488), (1795, 11104), (2776, 7180), (2872, 6940), (3470, 5744), (3590, 5552)]