20307903

素因数分解:

$3^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{661}}^1$

素因数の和:708

約数の個数: 48

約数和(自身を含む): 36224640

約数和(自身を除く): 15916737

約数列:

[1, 3, 7, 11, 19, 21, 33, 49, 57, 77, 133, 147, 209, 231, 399, 539, 627, 661, 931, 1463, 1617, 1983, 2793, 4389, 4627, 7271, 10241, 12559, 13881, 21813, 30723, 32389, 37677, 50897, 87913, 97167, 138149, 152691, 263739, 356279, 414447, 615391, 967043, 1068837, 1846173, 2901129, 6769301, 20307903]

約数ペア:

[(1, 20307903), (3, 6769301), (7, 2901129), (11, 1846173), (19, 1068837), (21, 967043), (33, 615391), (49, 414447), (57, 356279), (77, 263739), (133, 152691), (147, 138149), (209, 97167), (231, 87913), (399, 50897), (539, 37677), (627, 32389), (661, 30723), (931, 21813), (1463, 13881), (1617, 12559), (1983, 10241), (2793, 7271), (4389, 4627)]