19958595

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{83}}^1$

素因数の和:172

約数の個数: 64

約数和(自身を含む): 36578304

約数和(自身を除く): 16619709

約数列:

[1, 3, 5, 15, 17, 23, 41, 51, 69, 83, 85, 115, 123, 205, 249, 255, 345, 391, 415, 615, 697, 943, 1173, 1245, 1411, 1909, 1955, 2091, 2829, 3403, 3485, 4233, 4715, 5727, 5865, 7055, 9545, 10209, 10455, 14145, 16031, 17015, 21165, 28635, 32453, 48093, 51045, 57851, 78269, 80155, 97359, 162265, 173553, 234807, 240465, 289255, 391345, 486795, 867765, 1174035, 1330573, 3991719, 6652865, 19958595]

約数ペア:

[(1, 19958595), (3, 6652865), (5, 3991719), (15, 1330573), (17, 1174035), (23, 867765), (41, 486795), (51, 391345), (69, 289255), (83, 240465), (85, 234807), (115, 173553), (123, 162265), (205, 97359), (249, 80155), (255, 78269), (345, 57851), (391, 51045), (415, 48093), (615, 32453), (697, 28635), (943, 21165), (1173, 17015), (1245, 16031), (1411, 14145), (1909, 10455), (1955, 10209), (2091, 9545), (2829, 7055), (3403, 5865), (3485, 5727), (4233, 4715)]