20805008

素因数分解:

$2^4\times 7^3\times {\mathrm{17}}^1\times {\mathrm{223}}^1$

素因数の和:269

約数の個数: 80

約数和(自身を含む): 49996800

約数和(自身を除く): 29191792

約数列:

[1, 2, 4, 7, 8, 14, 16, 17, 28, 34, 49, 56, 68, 98, 112, 119, 136, 196, 223, 238, 272, 343, 392, 446, 476, 686, 784, 833, 892, 952, 1372, 1561, 1666, 1784, 1904, 2744, 3122, 3332, 3568, 3791, 5488, 5831, 6244, 6664, 7582, 10927, 11662, 12488, 13328, 15164, 21854, 23324, 24976, 26537, 30328, 43708, 46648, 53074, 60656, 76489, 87416, 93296, 106148, 152978, 174832, 185759, 212296, 305956, 371518, 424592, 611912, 743036, 1223824, 1300313, 1486072, 2600626, 2972144, 5201252, 10402504, 20805008]

約数ペア:

[(1, 20805008), (2, 10402504), (4, 5201252), (7, 2972144), (8, 2600626), (14, 1486072), (16, 1300313), (17, 1223824), (28, 743036), (34, 611912), (49, 424592), (56, 371518), (68, 305956), (98, 212296), (112, 185759), (119, 174832), (136, 152978), (196, 106148), (223, 93296), (238, 87416), (272, 76489), (343, 60656), (392, 53074), (446, 46648), (476, 43708), (686, 30328), (784, 26537), (833, 24976), (892, 23324), (952, 21854), (1372, 15164), (1561, 13328), (1666, 12488), (1784, 11662), (1904, 10927), (2744, 7582), (3122, 6664), (3332, 6244), (3568, 5831), (3791, 5488)]