20215965

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{761}}^1$

素因数の和:810

約数の個数: 64

約数和(自身を含む): 42135552

約数和(自身を除く): 21919587

約数列:

[1, 3, 5, 7, 11, 15, 21, 23, 33, 35, 55, 69, 77, 105, 115, 161, 165, 231, 253, 345, 385, 483, 759, 761, 805, 1155, 1265, 1771, 2283, 2415, 3795, 3805, 5313, 5327, 8371, 8855, 11415, 15981, 17503, 25113, 26565, 26635, 41855, 52509, 58597, 79905, 87515, 122521, 125565, 175791, 192533, 262545, 292985, 367563, 577599, 612605, 878955, 962665, 1347731, 1837815, 2887995, 4043193, 6738655, 20215965]

約数ペア:

[(1, 20215965), (3, 6738655), (5, 4043193), (7, 2887995), (11, 1837815), (15, 1347731), (21, 962665), (23, 878955), (33, 612605), (35, 577599), (55, 367563), (69, 292985), (77, 262545), (105, 192533), (115, 175791), (161, 125565), (165, 122521), (231, 87515), (253, 79905), (345, 58597), (385, 52509), (483, 41855), (759, 26635), (761, 26565), (805, 25113), (1155, 17503), (1265, 15981), (1771, 11415), (2283, 8855), (2415, 8371), (3795, 5327), (3805, 5313)]