408252020

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^2\times {\mathrm{1931}}^1$

素因数の和:2013

約数の個数: 72

約数和(自身を含む): 966911904

約数和(自身を除く): 558659884

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 31, 44, 55, 62, 110, 124, 155, 220, 310, 341, 620, 682, 961, 1364, 1705, 1922, 1931, 3410, 3844, 3862, 4805, 6820, 7724, 9610, 9655, 10571, 19220, 19310, 21142, 21241, 38620, 42284, 42482, 52855, 59861, 84964, 105710, 106205, 119722, 211420, 212410, 239444, 299305, 424820, 598610, 658471, 1197220, 1316942, 1855691, 2633884, 3292355, 3711382, 6584710, 7422764, 9278455, 13169420, 18556910, 20412601, 37113820, 40825202, 81650404, 102063005, 204126010, 408252020]

約数ペア:

[(1, 408252020), (2, 204126010), (4, 102063005), (5, 81650404), (10, 40825202), (11, 37113820), (20, 20412601), (22, 18556910), (31, 13169420), (44, 9278455), (55, 7422764), (62, 6584710), (110, 3711382), (124, 3292355), (155, 2633884), (220, 1855691), (310, 1316942), (341, 1197220), (620, 658471), (682, 598610), (961, 424820), (1364, 299305), (1705, 239444), (1922, 212410), (1931, 211420), (3410, 119722), (3844, 106205), (3862, 105710), (4805, 84964), (6820, 59861), (7724, 52855), (9610, 42482), (9655, 42284), (10571, 38620), (19220, 21241), (19310, 21142)]