21993816

素因数分解:

$2^3\times 3^1\times {\mathrm{13}}^1\times {\mathrm{157}}^1\times {\mathrm{449}}^1$

素因数の和:628

約数の個数: 64

約数和(自身を含む): 59724000

約数和(自身を除く): 37730184

約数列:

[1, 2, 3, 4, 6, 8, 12, 13, 24, 26, 39, 52, 78, 104, 156, 157, 312, 314, 449, 471, 628, 898, 942, 1256, 1347, 1796, 1884, 2041, 2694, 3592, 3768, 4082, 5388, 5837, 6123, 8164, 10776, 11674, 12246, 16328, 17511, 23348, 24492, 35022, 46696, 48984, 70044, 70493, 140088, 140986, 211479, 281972, 422958, 563944, 845916, 916409, 1691832, 1832818, 2749227, 3665636, 5498454, 7331272, 10996908, 21993816]

約数ペア:

[(1, 21993816), (2, 10996908), (3, 7331272), (4, 5498454), (6, 3665636), (8, 2749227), (12, 1832818), (13, 1691832), (24, 916409), (26, 845916), (39, 563944), (52, 422958), (78, 281972), (104, 211479), (156, 140986), (157, 140088), (312, 70493), (314, 70044), (449, 48984), (471, 46696), (628, 35022), (898, 24492), (942, 23348), (1256, 17511), (1347, 16328), (1796, 12246), (1884, 11674), (2041, 10776), (2694, 8164), (3592, 6123), (3768, 5837), (4082, 5388)]