19681840

素因数分解:

$2^4\times 5^1\times {\mathrm{347}}^1\times {\mathrm{709}}^1$

素因数の和:1069

約数の個数: 40

約数和(自身を含む): 45956880

約数和(自身を除く): 26275040

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 347, 694, 709, 1388, 1418, 1735, 2776, 2836, 3470, 3545, 5552, 5672, 6940, 7090, 11344, 13880, 14180, 27760, 28360, 56720, 246023, 492046, 984092, 1230115, 1968184, 2460230, 3936368, 4920460, 9840920, 19681840]

約数ペア:

[(1, 19681840), (2, 9840920), (4, 4920460), (5, 3936368), (8, 2460230), (10, 1968184), (16, 1230115), (20, 984092), (40, 492046), (80, 246023), (347, 56720), (694, 28360), (709, 27760), (1388, 14180), (1418, 13880), (1735, 11344), (2776, 7090), (2836, 6940), (3470, 5672), (3545, 5552)]