19988955

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{89}}^1$

素因数の和:161

約数の個数: 96

約数和(自身を含む): 43130880

約数和(自身を除く): 23141925

約数列:

[1, 3, 5, 7, 9, 15, 21, 23, 31, 35, 45, 63, 69, 89, 93, 105, 115, 155, 161, 207, 217, 267, 279, 315, 345, 445, 465, 483, 623, 651, 713, 801, 805, 1035, 1085, 1335, 1395, 1449, 1869, 1953, 2047, 2139, 2415, 2759, 3115, 3255, 3565, 4005, 4991, 5607, 6141, 6417, 7245, 8277, 9345, 9765, 10235, 10695, 13795, 14329, 14973, 18423, 19313, 24831, 24955, 28035, 30705, 32085, 41385, 42987, 44919, 57939, 63457, 71645, 74865, 92115, 96565, 124155, 128961, 173817, 190371, 214935, 224595, 289695, 317285, 444199, 571113, 644805, 869085, 951855, 1332597, 2220995, 2855565, 3997791, 6662985, 19988955]

約数ペア:

[(1, 19988955), (3, 6662985), (5, 3997791), (7, 2855565), (9, 2220995), (15, 1332597), (21, 951855), (23, 869085), (31, 644805), (35, 571113), (45, 444199), (63, 317285), (69, 289695), (89, 224595), (93, 214935), (105, 190371), (115, 173817), (155, 128961), (161, 124155), (207, 96565), (217, 92115), (267, 74865), (279, 71645), (315, 63457), (345, 57939), (445, 44919), (465, 42987), (483, 41385), (623, 32085), (651, 30705), (713, 28035), (801, 24955), (805, 24831), (1035, 19313), (1085, 18423), (1335, 14973), (1395, 14329), (1449, 13795), (1869, 10695), (1953, 10235), (2047, 9765), (2139, 9345), (2415, 8277), (2759, 7245), (3115, 6417), (3255, 6141), (3565, 5607), (4005, 4991)]