19722340

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{157}}^1\times {\mathrm{571}}^1$

素因数の和:748

約数の個数: 48

約数和(自身を含む): 45549504

約数和(自身を除く): 25827164

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 157, 220, 314, 571, 628, 785, 1142, 1570, 1727, 2284, 2855, 3140, 3454, 5710, 6281, 6908, 8635, 11420, 12562, 17270, 25124, 31405, 34540, 62810, 89647, 125620, 179294, 358588, 448235, 896470, 986117, 1792940, 1972234, 3944468, 4930585, 9861170, 19722340]

約数ペア:

[(1, 19722340), (2, 9861170), (4, 4930585), (5, 3944468), (10, 1972234), (11, 1792940), (20, 986117), (22, 896470), (44, 448235), (55, 358588), (110, 179294), (157, 125620), (220, 89647), (314, 62810), (571, 34540), (628, 31405), (785, 25124), (1142, 17270), (1570, 12562), (1727, 11420), (2284, 8635), (2855, 6908), (3140, 6281), (3454, 5710)]