20688720

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{349}}^1$

素因数の和:397

約数の個数: 160

約数和(自身を含む): 72912000

約数和(自身を除く): 52223280

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 16, 19, 20, 24, 26, 30, 38, 39, 40, 48, 52, 57, 60, 65, 76, 78, 80, 95, 104, 114, 120, 130, 152, 156, 190, 195, 208, 228, 240, 247, 260, 285, 304, 312, 349, 380, 390, 456, 494, 520, 570, 624, 698, 741, 760, 780, 912, 988, 1040, 1047, 1140, 1235, 1396, 1482, 1520, 1560, 1745, 1976, 2094, 2280, 2470, 2792, 2964, 3120, 3490, 3705, 3952, 4188, 4537, 4560, 4940, 5235, 5584, 5928, 6631, 6980, 7410, 8376, 9074, 9880, 10470, 11856, 13262, 13611, 13960, 14820, 16752, 18148, 19760, 19893, 20940, 22685, 26524, 27222, 27920, 29640, 33155, 36296, 39786, 41880, 45370, 53048, 54444, 59280, 66310, 68055, 72592, 79572, 83760, 86203, 90740, 99465, 106096, 108888, 132620, 136110, 159144, 172406, 181480, 198930, 217776, 258609, 265240, 272220, 318288, 344812, 362960, 397860, 431015, 517218, 530480, 544440, 689624, 795720, 862030, 1034436, 1088880, 1293045, 1379248, 1591440, 1724060, 2068872, 2586090, 3448120, 4137744, 5172180, 6896240, 10344360, 20688720]

約数ペア:

[(1, 20688720), (2, 10344360), (3, 6896240), (4, 5172180), (5, 4137744), (6, 3448120), (8, 2586090), (10, 2068872), (12, 1724060), (13, 1591440), (15, 1379248), (16, 1293045), (19, 1088880), (20, 1034436), (24, 862030), (26, 795720), (30, 689624), (38, 544440), (39, 530480), (40, 517218), (48, 431015), (52, 397860), (57, 362960), (60, 344812), (65, 318288), (76, 272220), (78, 265240), (80, 258609), (95, 217776), (104, 198930), (114, 181480), (120, 172406), (130, 159144), (152, 136110), (156, 132620), (190, 108888), (195, 106096), (208, 99465), (228, 90740), (240, 86203), (247, 83760), (260, 79572), (285, 72592), (304, 68055), (312, 66310), (349, 59280), (380, 54444), (390, 53048), (456, 45370), (494, 41880), (520, 39786), (570, 36296), (624, 33155), (698, 29640), (741, 27920), (760, 27222), (780, 26524), (912, 22685), (988, 20940), (1040, 19893), (1047, 19760), (1140, 18148), (1235, 16752), (1396, 14820), (1482, 13960), (1520, 13611), (1560, 13262), (1745, 11856), (1976, 10470), (2094, 9880), (2280, 9074), (2470, 8376), (2792, 7410), (2964, 6980), (3120, 6631), (3490, 5928), (3705, 5584), (3952, 5235), (4188, 4940), (4537, 4560)]