21075940

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{1499}}^1$

素因数の和:1564

約数の個数: 48

約数和(自身を含む): 47880000

約数和(自身を除く): 26804060

約数列:

[1, 2, 4, 5, 10, 19, 20, 37, 38, 74, 76, 95, 148, 185, 190, 370, 380, 703, 740, 1406, 1499, 2812, 2998, 3515, 5996, 7030, 7495, 14060, 14990, 28481, 29980, 55463, 56962, 110926, 113924, 142405, 221852, 277315, 284810, 554630, 569620, 1053797, 1109260, 2107594, 4215188, 5268985, 10537970, 21075940]

約数ペア:

[(1, 21075940), (2, 10537970), (4, 5268985), (5, 4215188), (10, 2107594), (19, 1109260), (20, 1053797), (37, 569620), (38, 554630), (74, 284810), (76, 277315), (95, 221852), (148, 142405), (185, 113924), (190, 110926), (370, 56962), (380, 55463), (703, 29980), (740, 28481), (1406, 14990), (1499, 14060), (2812, 7495), (2998, 7030), (3515, 5996)]