20951280

素因数分解:

$2^4\times 3^2\times 5^1\times 7^1\times {\mathrm{4157}}^1$

素因数の和:4183

約数の個数: 120

約数和(自身を含む): 80432352

約数和(自身を除く): 59481072

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 24, 28, 30, 35, 36, 40, 42, 45, 48, 56, 60, 63, 70, 72, 80, 84, 90, 105, 112, 120, 126, 140, 144, 168, 180, 210, 240, 252, 280, 315, 336, 360, 420, 504, 560, 630, 720, 840, 1008, 1260, 1680, 2520, 4157, 5040, 8314, 12471, 16628, 20785, 24942, 29099, 33256, 37413, 41570, 49884, 58198, 62355, 66512, 74826, 83140, 87297, 99768, 116396, 124710, 145495, 149652, 166280, 174594, 187065, 199536, 232792, 249420, 261891, 290990, 299304, 332560, 349188, 374130, 436485, 465584, 498840, 523782, 581980, 598608, 698376, 748260, 872970, 997680, 1047564, 1163960, 1309455, 1396752, 1496520, 1745940, 2095128, 2327920, 2618910, 2993040, 3491880, 4190256, 5237820, 6983760, 10475640, 20951280]

約数ペア:

[(1, 20951280), (2, 10475640), (3, 6983760), (4, 5237820), (5, 4190256), (6, 3491880), (7, 2993040), (8, 2618910), (9, 2327920), (10, 2095128), (12, 1745940), (14, 1496520), (15, 1396752), (16, 1309455), (18, 1163960), (20, 1047564), (21, 997680), (24, 872970), (28, 748260), (30, 698376), (35, 598608), (36, 581980), (40, 523782), (42, 498840), (45, 465584), (48, 436485), (56, 374130), (60, 349188), (63, 332560), (70, 299304), (72, 290990), (80, 261891), (84, 249420), (90, 232792), (105, 199536), (112, 187065), (120, 174594), (126, 166280), (140, 149652), (144, 145495), (168, 124710), (180, 116396), (210, 99768), (240, 87297), (252, 83140), (280, 74826), (315, 66512), (336, 62355), (360, 58198), (420, 49884), (504, 41570), (560, 37413), (630, 33256), (720, 29099), (840, 24942), (1008, 20785), (1260, 16628), (1680, 12471), (2520, 8314), (4157, 5040)]