21321248

素因数分解:

$2^5\times {\mathrm{13}}^1\times {\mathrm{107}}^1\times {\mathrm{479}}^1$

素因数の和:609

約数の個数: 48

約数和(自身を含む): 45722880

約数和(自身を除く): 24401632

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 52, 104, 107, 208, 214, 416, 428, 479, 856, 958, 1391, 1712, 1916, 2782, 3424, 3832, 5564, 6227, 7664, 11128, 12454, 15328, 22256, 24908, 44512, 49816, 51253, 99632, 102506, 199264, 205012, 410024, 666289, 820048, 1332578, 1640096, 2665156, 5330312, 10660624, 21321248]

約数ペア:

[(1, 21321248), (2, 10660624), (4, 5330312), (8, 2665156), (13, 1640096), (16, 1332578), (26, 820048), (32, 666289), (52, 410024), (104, 205012), (107, 199264), (208, 102506), (214, 99632), (416, 51253), (428, 49816), (479, 44512), (856, 24908), (958, 22256), (1391, 15328), (1712, 12454), (1916, 11128), (2782, 7664), (3424, 6227), (3832, 5564)]