21001519550

素因数分解:

$2^1\times 5^2\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{537811}}^1$

素因数の和:537905

約数の個数: 48

約数和(自身を含む): 43214269824

約数和(自身を除く): 22212750274

約数列:

[1, 2, 5, 10, 11, 22, 25, 50, 55, 71, 110, 142, 275, 355, 550, 710, 781, 1562, 1775, 3550, 3905, 7810, 19525, 39050, 537811, 1075622, 2689055, 5378110, 5915921, 11831842, 13445275, 26890550, 29579605, 38184581, 59159210, 76369162, 147898025, 190922905, 295796050, 381845810, 420030391, 840060782, 954614525, 1909229050, 2100151955, 4200303910, 10500759775, 21001519550]

約数ペア:

[(1, 21001519550), (2, 10500759775), (5, 4200303910), (10, 2100151955), (11, 1909229050), (22, 954614525), (25, 840060782), (50, 420030391), (55, 381845810), (71, 295796050), (110, 190922905), (142, 147898025), (275, 76369162), (355, 59159210), (550, 38184581), (710, 29579605), (781, 26890550), (1562, 13445275), (1775, 11831842), (3550, 5915921), (3905, 5378110), (7810, 2689055), (19525, 1075622), (39050, 537811)]