20857575640

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{151}}^1\times {\mathrm{313931}}^1$

素因数の和:314104

約数の個数: 64

約数和(自身を含む): 51535077120

約数和(自身を除く): 30677501480

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 151, 220, 302, 440, 604, 755, 1208, 1510, 1661, 3020, 3322, 6040, 6644, 8305, 13288, 16610, 33220, 66440, 313931, 627862, 1255724, 1569655, 2511448, 3139310, 3453241, 6278620, 6906482, 12557240, 13812964, 17266205, 27625928, 34532410, 47403581, 69064820, 94807162, 138129640, 189614324, 237017905, 379228648, 474035810, 521439391, 948071620, 1042878782, 1896143240, 2085757564, 2607196955, 4171515128, 5214393910, 10428787820, 20857575640]

約数ペア:

[(1, 20857575640), (2, 10428787820), (4, 5214393910), (5, 4171515128), (8, 2607196955), (10, 2085757564), (11, 1896143240), (20, 1042878782), (22, 948071620), (40, 521439391), (44, 474035810), (55, 379228648), (88, 237017905), (110, 189614324), (151, 138129640), (220, 94807162), (302, 69064820), (440, 47403581), (604, 34532410), (755, 27625928), (1208, 17266205), (1510, 13812964), (1661, 12557240), (3020, 6906482), (3322, 6278620), (6040, 3453241), (6644, 3139310), (8305, 2511448), (13288, 1569655), (16610, 1255724), (33220, 627862), (66440, 313931)]