20639520

素因数分解:

$2^5\times 3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{1303}}^1$

素因数の和:1335

約数の個数: 144

約数和(自身を含む): 76894272

約数和(自身を除く): 56254752

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 11, 12, 15, 16, 18, 20, 22, 24, 30, 32, 33, 36, 40, 44, 45, 48, 55, 60, 66, 72, 80, 88, 90, 96, 99, 110, 120, 132, 144, 160, 165, 176, 180, 198, 220, 240, 264, 288, 330, 352, 360, 396, 440, 480, 495, 528, 660, 720, 792, 880, 990, 1056, 1303, 1320, 1440, 1584, 1760, 1980, 2606, 2640, 3168, 3909, 3960, 5212, 5280, 6515, 7818, 7920, 10424, 11727, 13030, 14333, 15636, 15840, 19545, 20848, 23454, 26060, 28666, 31272, 39090, 41696, 42999, 46908, 52120, 57332, 58635, 62544, 71665, 78180, 85998, 93816, 104240, 114664, 117270, 125088, 128997, 143330, 156360, 171996, 187632, 208480, 214995, 229328, 234540, 257994, 286660, 312720, 343992, 375264, 429990, 458656, 469080, 515988, 573320, 625440, 644985, 687984, 859980, 938160, 1031976, 1146640, 1289970, 1375968, 1719960, 1876320, 2063952, 2293280, 2579940, 3439920, 4127904, 5159880, 6879840, 10319760, 20639520]

約数ペア:

[(1, 20639520), (2, 10319760), (3, 6879840), (4, 5159880), (5, 4127904), (6, 3439920), (8, 2579940), (9, 2293280), (10, 2063952), (11, 1876320), (12, 1719960), (15, 1375968), (16, 1289970), (18, 1146640), (20, 1031976), (22, 938160), (24, 859980), (30, 687984), (32, 644985), (33, 625440), (36, 573320), (40, 515988), (44, 469080), (45, 458656), (48, 429990), (55, 375264), (60, 343992), (66, 312720), (72, 286660), (80, 257994), (88, 234540), (90, 229328), (96, 214995), (99, 208480), (110, 187632), (120, 171996), (132, 156360), (144, 143330), (160, 128997), (165, 125088), (176, 117270), (180, 114664), (198, 104240), (220, 93816), (240, 85998), (264, 78180), (288, 71665), (330, 62544), (352, 58635), (360, 57332), (396, 52120), (440, 46908), (480, 42999), (495, 41696), (528, 39090), (660, 31272), (720, 28666), (792, 26060), (880, 23454), (990, 20848), (1056, 19545), (1303, 15840), (1320, 15636), (1440, 14333), (1584, 13030), (1760, 11727), (1980, 10424), (2606, 7920), (2640, 7818), (3168, 6515), (3909, 5280), (3960, 5212)]