20872904

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{419}}^1\times {\mathrm{479}}^1$

素因数の和:917

約数の個数: 32

約数和(自身を含む): 42336000

約数和(自身を除く): 21463096

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 419, 479, 838, 958, 1676, 1916, 3352, 3832, 5447, 6227, 10894, 12454, 21788, 24908, 43576, 49816, 200701, 401402, 802804, 1605608, 2609113, 5218226, 10436452, 20872904]

約数ペア:

[(1, 20872904), (2, 10436452), (4, 5218226), (8, 2609113), (13, 1605608), (26, 802804), (52, 401402), (104, 200701), (419, 49816), (479, 43576), (838, 24908), (958, 21788), (1676, 12454), (1916, 10894), (3352, 6227), (3832, 5447)]