20377680

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{197}}^1\times {\mathrm{431}}^1$

素因数の和:644

約数の個数: 80

約数和(自身を含む): 63638784

約数和(自身を除く): 43261104

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 120, 197, 240, 394, 431, 591, 788, 862, 985, 1182, 1293, 1576, 1724, 1970, 2155, 2364, 2586, 2955, 3152, 3448, 3940, 4310, 4728, 5172, 5910, 6465, 6896, 7880, 8620, 9456, 10344, 11820, 12930, 15760, 17240, 20688, 23640, 25860, 34480, 47280, 51720, 84907, 103440, 169814, 254721, 339628, 424535, 509442, 679256, 849070, 1018884, 1273605, 1358512, 1698140, 2037768, 2547210, 3396280, 4075536, 5094420, 6792560, 10188840, 20377680]

約数ペア:

[(1, 20377680), (2, 10188840), (3, 6792560), (4, 5094420), (5, 4075536), (6, 3396280), (8, 2547210), (10, 2037768), (12, 1698140), (15, 1358512), (16, 1273605), (20, 1018884), (24, 849070), (30, 679256), (40, 509442), (48, 424535), (60, 339628), (80, 254721), (120, 169814), (197, 103440), (240, 84907), (394, 51720), (431, 47280), (591, 34480), (788, 25860), (862, 23640), (985, 20688), (1182, 17240), (1293, 15760), (1576, 12930), (1724, 11820), (1970, 10344), (2155, 9456), (2364, 8620), (2586, 7880), (2955, 6896), (3152, 6465), (3448, 5910), (3940, 5172), (4310, 4728)]