21042020

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{67}}^1\times {\mathrm{383}}^1$

素因数の和:500

約数の個数: 48

約数和(自身を含む): 46061568

約数和(自身を除く): 25019548

約数列:

[1, 2, 4, 5, 10, 20, 41, 67, 82, 134, 164, 205, 268, 335, 383, 410, 670, 766, 820, 1340, 1532, 1915, 2747, 3830, 5494, 7660, 10988, 13735, 15703, 25661, 27470, 31406, 51322, 54940, 62812, 78515, 102644, 128305, 157030, 256610, 314060, 513220, 1052101, 2104202, 4208404, 5260505, 10521010, 21042020]

約数ペア:

[(1, 21042020), (2, 10521010), (4, 5260505), (5, 4208404), (10, 2104202), (20, 1052101), (41, 513220), (67, 314060), (82, 256610), (134, 157030), (164, 128305), (205, 102644), (268, 78515), (335, 62812), (383, 54940), (410, 51322), (670, 31406), (766, 27470), (820, 25661), (1340, 15703), (1532, 13735), (1915, 10988), (2747, 7660), (3830, 5494)]