19163980

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{7919}}^1$

素因数の和:7950

約数の個数: 36

約数和(自身を含む): 44241120

約数和(自身を除く): 25077140

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 121, 220, 242, 484, 605, 1210, 2420, 7919, 15838, 31676, 39595, 79190, 87109, 158380, 174218, 348436, 435545, 871090, 958199, 1742180, 1916398, 3832796, 4790995, 9581990, 19163980]

約数ペア:

[(1, 19163980), (2, 9581990), (4, 4790995), (5, 3832796), (10, 1916398), (11, 1742180), (20, 958199), (22, 871090), (44, 435545), (55, 348436), (110, 174218), (121, 158380), (220, 87109), (242, 79190), (484, 39595), (605, 31676), (1210, 15838), (2420, 7919)]