21044020

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{79}}^1\times {\mathrm{701}}^1$

素因数の和:808

約数の個数: 48

約数和(自身を含む): 47174400

約数和(自身を除く): 26130380

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 79, 95, 158, 190, 316, 380, 395, 701, 790, 1402, 1501, 1580, 2804, 3002, 3505, 6004, 7010, 7505, 13319, 14020, 15010, 26638, 30020, 53276, 55379, 66595, 110758, 133190, 221516, 266380, 276895, 553790, 1052201, 1107580, 2104402, 4208804, 5261005, 10522010, 21044020]

約数ペア:

[(1, 21044020), (2, 10522010), (4, 5261005), (5, 4208804), (10, 2104402), (19, 1107580), (20, 1052201), (38, 553790), (76, 276895), (79, 266380), (95, 221516), (158, 133190), (190, 110758), (316, 66595), (380, 55379), (395, 53276), (701, 30020), (790, 26638), (1402, 15010), (1501, 14020), (1580, 13319), (2804, 7505), (3002, 7010), (3505, 6004)]