19878404

素因数分解:

$2^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{97}}^1\times {\mathrm{563}}^1$

素因数の和:684

約数の個数: 48

約数和(自身を含む): 43333248

約数和(自身を除く): 23454844

約数列:

[1, 2, 4, 7, 13, 14, 26, 28, 52, 91, 97, 182, 194, 364, 388, 563, 679, 1126, 1261, 1358, 2252, 2522, 2716, 3941, 5044, 7319, 7882, 8827, 14638, 15764, 17654, 29276, 35308, 51233, 54611, 102466, 109222, 204932, 218444, 382277, 709943, 764554, 1419886, 1529108, 2839772, 4969601, 9939202, 19878404]

約数ペア:

[(1, 19878404), (2, 9939202), (4, 4969601), (7, 2839772), (13, 1529108), (14, 1419886), (26, 764554), (28, 709943), (52, 382277), (91, 218444), (97, 204932), (182, 109222), (194, 102466), (364, 54611), (388, 51233), (563, 35308), (679, 29276), (1126, 17654), (1261, 15764), (1358, 14638), (2252, 8827), (2522, 7882), (2716, 7319), (3941, 5044)]