21307005

素因数分解:

$3^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{67}}^1\times {\mathrm{191}}^1$

素因数の和:306

約数の個数: 48

約数和(自身を含む): 38697984

約数和(自身を除く): 17390979

約数列:

[1, 3, 5, 9, 15, 37, 45, 67, 111, 185, 191, 201, 333, 335, 555, 573, 603, 955, 1005, 1665, 1719, 2479, 2865, 3015, 7067, 7437, 8595, 12395, 12797, 21201, 22311, 35335, 37185, 38391, 63603, 63985, 106005, 111555, 115173, 191955, 318015, 473489, 575865, 1420467, 2367445, 4261401, 7102335, 21307005]

約数ペア:

[(1, 21307005), (3, 7102335), (5, 4261401), (9, 2367445), (15, 1420467), (37, 575865), (45, 473489), (67, 318015), (111, 191955), (185, 115173), (191, 111555), (201, 106005), (333, 63985), (335, 63603), (555, 38391), (573, 37185), (603, 35335), (955, 22311), (1005, 21201), (1665, 12797), (1719, 12395), (2479, 8595), (2865, 7437), (3015, 7067)]