21000681190

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{89}}^1\times {\mathrm{971}}^1\times {\mathrm{1279}}^1$

素因数の和:2365

約数の個数: 64

約数和(自身を含む): 40310784000

約数和(自身を除く): 19310102810

約数列:

[1, 2, 5, 10, 19, 38, 89, 95, 178, 190, 445, 890, 971, 1279, 1691, 1942, 2558, 3382, 4855, 6395, 8455, 9710, 12790, 16910, 18449, 24301, 36898, 48602, 86419, 92245, 113831, 121505, 172838, 184490, 227662, 243010, 432095, 569155, 864190, 1138310, 1241909, 1641961, 2162789, 2483818, 3283922, 4325578, 6209545, 8209805, 10813945, 12419090, 16419610, 21627890, 23596271, 47192542, 110529901, 117981355, 221059802, 235962710, 552649505, 1105299010, 2100068119, 4200136238, 10500340595, 21000681190]

約数ペア:

[(1, 21000681190), (2, 10500340595), (5, 4200136238), (10, 2100068119), (19, 1105299010), (38, 552649505), (89, 235962710), (95, 221059802), (178, 117981355), (190, 110529901), (445, 47192542), (890, 23596271), (971, 21627890), (1279, 16419610), (1691, 12419090), (1942, 10813945), (2558, 8209805), (3382, 6209545), (4855, 4325578), (6395, 3283922), (8455, 2483818), (9710, 2162789), (12790, 1641961), (16910, 1241909), (18449, 1138310), (24301, 864190), (36898, 569155), (48602, 432095), (86419, 243010), (92245, 227662), (113831, 184490), (121505, 172838)]