20793760

素因数分解:

$2^5\times 5^1\times {\mathrm{13}}^2\times {\mathrm{769}}^1$

素因数の和:810

約数の個数: 72

約数和(自身を含む): 53263980

約数和(自身を除く): 32470220

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 65, 80, 104, 130, 160, 169, 208, 260, 338, 416, 520, 676, 769, 845, 1040, 1352, 1538, 1690, 2080, 2704, 3076, 3380, 3845, 5408, 6152, 6760, 7690, 9997, 12304, 13520, 15380, 19994, 24608, 27040, 30760, 39988, 49985, 61520, 79976, 99970, 123040, 129961, 159952, 199940, 259922, 319904, 399880, 519844, 649805, 799760, 1039688, 1299610, 1599520, 2079376, 2599220, 4158752, 5198440, 10396880, 20793760]

約数ペア:

[(1, 20793760), (2, 10396880), (4, 5198440), (5, 4158752), (8, 2599220), (10, 2079376), (13, 1599520), (16, 1299610), (20, 1039688), (26, 799760), (32, 649805), (40, 519844), (52, 399880), (65, 319904), (80, 259922), (104, 199940), (130, 159952), (160, 129961), (169, 123040), (208, 99970), (260, 79976), (338, 61520), (416, 49985), (520, 39988), (676, 30760), (769, 27040), (845, 24608), (1040, 19994), (1352, 15380), (1538, 13520), (1690, 12304), (2080, 9997), (2704, 7690), (3076, 6760), (3380, 6152), (3845, 5408)]