20938905

素因数分解:

$3^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{97}}^1$

素因数の和:168

約数の個数: 80

約数和(自身を含む): 41835024

約数和(自身を除く): 20896119

約数列:

[1, 3, 5, 9, 13, 15, 27, 39, 41, 45, 65, 81, 97, 117, 123, 135, 195, 205, 291, 351, 369, 405, 485, 533, 585, 615, 873, 1053, 1107, 1261, 1455, 1599, 1755, 1845, 2619, 2665, 3321, 3783, 3977, 4365, 4797, 5265, 5535, 6305, 7857, 7995, 11349, 11931, 13095, 14391, 16605, 18915, 19885, 23985, 34047, 35793, 39285, 43173, 51701, 56745, 59655, 71955, 102141, 107379, 155103, 170235, 178965, 215865, 258505, 322137, 465309, 510705, 536895, 775515, 1395927, 1610685, 2326545, 4187781, 6979635, 20938905]

約数ペア:

[(1, 20938905), (3, 6979635), (5, 4187781), (9, 2326545), (13, 1610685), (15, 1395927), (27, 775515), (39, 536895), (41, 510705), (45, 465309), (65, 322137), (81, 258505), (97, 215865), (117, 178965), (123, 170235), (135, 155103), (195, 107379), (205, 102141), (291, 71955), (351, 59655), (369, 56745), (405, 51701), (485, 43173), (533, 39285), (585, 35793), (615, 34047), (873, 23985), (1053, 19885), (1107, 18915), (1261, 16605), (1455, 14391), (1599, 13095), (1755, 11931), (1845, 11349), (2619, 7995), (2665, 7857), (3321, 6305), (3783, 5535), (3977, 5265), (4365, 4797)]