19899555

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{131}}^1$

素因数の和:212

約数の個数: 64

約数和(自身を含む): 37255680

約数和(自身を除く): 17356125

約数列:

[1, 3, 5, 13, 15, 19, 39, 41, 57, 65, 95, 123, 131, 195, 205, 247, 285, 393, 533, 615, 655, 741, 779, 1235, 1599, 1703, 1965, 2337, 2489, 2665, 3705, 3895, 5109, 5371, 7467, 7995, 8515, 10127, 11685, 12445, 16113, 25545, 26855, 30381, 32357, 37335, 50635, 69823, 80565, 97071, 102049, 151905, 161785, 209469, 306147, 349115, 485355, 510245, 1047345, 1326637, 1530735, 3979911, 6633185, 19899555]

約数ペア:

[(1, 19899555), (3, 6633185), (5, 3979911), (13, 1530735), (15, 1326637), (19, 1047345), (39, 510245), (41, 485355), (57, 349115), (65, 306147), (95, 209469), (123, 161785), (131, 151905), (195, 102049), (205, 97071), (247, 80565), (285, 69823), (393, 50635), (533, 37335), (615, 32357), (655, 30381), (741, 26855), (779, 25545), (1235, 16113), (1599, 12445), (1703, 11685), (1965, 10127), (2337, 8515), (2489, 7995), (2665, 7467), (3705, 5371), (3895, 5109)]