20581000

素因数分解:

$2^3\times 5^3\times {\mathrm{11}}^1\times {\mathrm{1871}}^1$

素因数の和:1903

約数の個数: 64

約数和(自身を含む): 52565760

約数和(自身を除く): 31984760

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 25, 40, 44, 50, 55, 88, 100, 110, 125, 200, 220, 250, 275, 440, 500, 550, 1000, 1100, 1375, 1871, 2200, 2750, 3742, 5500, 7484, 9355, 11000, 14968, 18710, 20581, 37420, 41162, 46775, 74840, 82324, 93550, 102905, 164648, 187100, 205810, 233875, 374200, 411620, 467750, 514525, 823240, 935500, 1029050, 1871000, 2058100, 2572625, 4116200, 5145250, 10290500, 20581000]

約数ペア:

[(1, 20581000), (2, 10290500), (4, 5145250), (5, 4116200), (8, 2572625), (10, 2058100), (11, 1871000), (20, 1029050), (22, 935500), (25, 823240), (40, 514525), (44, 467750), (50, 411620), (55, 374200), (88, 233875), (100, 205810), (110, 187100), (125, 164648), (200, 102905), (220, 93550), (250, 82324), (275, 74840), (440, 46775), (500, 41162), (550, 37420), (1000, 20581), (1100, 18710), (1375, 14968), (1871, 11000), (2200, 9355), (2750, 7484), (3742, 5500)]