19393880

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^2\times {\mathrm{4007}}^1$

素因数の和:4040

約数の個数: 48

約数和(自身を含む): 47975760

約数和(自身を除く): 28581880

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 121, 220, 242, 440, 484, 605, 968, 1210, 2420, 4007, 4840, 8014, 16028, 20035, 32056, 40070, 44077, 80140, 88154, 160280, 176308, 220385, 352616, 440770, 484847, 881540, 969694, 1763080, 1939388, 2424235, 3878776, 4848470, 9696940, 19393880]

約数ペア:

[(1, 19393880), (2, 9696940), (4, 4848470), (5, 3878776), (8, 2424235), (10, 1939388), (11, 1763080), (20, 969694), (22, 881540), (40, 484847), (44, 440770), (55, 352616), (88, 220385), (110, 176308), (121, 160280), (220, 88154), (242, 80140), (440, 44077), (484, 40070), (605, 32056), (968, 20035), (1210, 16028), (2420, 8014), (4007, 4840)]