21079916

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{137}}^1\times {\mathrm{269}}^1$

素因数の和:434

約数の個数: 48

約数和(自身を含む): 43817760

約数和(自身を除く): 22737844

約数列:

[1, 2, 4, 11, 13, 22, 26, 44, 52, 137, 143, 269, 274, 286, 538, 548, 572, 1076, 1507, 1781, 2959, 3014, 3497, 3562, 5918, 6028, 6994, 7124, 11836, 13988, 19591, 36853, 38467, 39182, 73706, 76934, 78364, 147412, 153868, 405383, 479089, 810766, 958178, 1621532, 1916356, 5269979, 10539958, 21079916]

約数ペア:

[(1, 21079916), (2, 10539958), (4, 5269979), (11, 1916356), (13, 1621532), (22, 958178), (26, 810766), (44, 479089), (52, 405383), (137, 153868), (143, 147412), (269, 78364), (274, 76934), (286, 73706), (538, 39182), (548, 38467), (572, 36853), (1076, 19591), (1507, 13988), (1781, 11836), (2959, 7124), (3014, 6994), (3497, 6028), (3562, 5918)]