21185008

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{179}}^1\times {\mathrm{569}}^1$

素因数の和:769

約数の個数: 40

約数和(自身を含む): 44528400

約数和(自身を除く): 23343392

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 179, 208, 358, 569, 716, 1138, 1432, 2276, 2327, 2864, 4552, 4654, 7397, 9104, 9308, 14794, 18616, 29588, 37232, 59176, 101851, 118352, 203702, 407404, 814808, 1324063, 1629616, 2648126, 5296252, 10592504, 21185008]

約数ペア:

[(1, 21185008), (2, 10592504), (4, 5296252), (8, 2648126), (13, 1629616), (16, 1324063), (26, 814808), (52, 407404), (104, 203702), (179, 118352), (208, 101851), (358, 59176), (569, 37232), (716, 29588), (1138, 18616), (1432, 14794), (2276, 9308), (2327, 9104), (2864, 7397), (4552, 4654)]