20563480

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{271}}^2$

素因数の和:560

約数の個数: 48

約数和(自身を含む): 53073360

約数和(自身を除く): 32509880

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 271, 280, 542, 1084, 1355, 1897, 2168, 2710, 3794, 5420, 7588, 9485, 10840, 15176, 18970, 37940, 73441, 75880, 146882, 293764, 367205, 514087, 587528, 734410, 1028174, 1468820, 2056348, 2570435, 2937640, 4112696, 5140870, 10281740, 20563480]

約数ペア:

[(1, 20563480), (2, 10281740), (4, 5140870), (5, 4112696), (7, 2937640), (8, 2570435), (10, 2056348), (14, 1468820), (20, 1028174), (28, 734410), (35, 587528), (40, 514087), (56, 367205), (70, 293764), (140, 146882), (271, 75880), (280, 73441), (542, 37940), (1084, 18970), (1355, 15176), (1897, 10840), (2168, 9485), (2710, 7588), (3794, 5420)]