21351512

素因数分解:

$2^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{139}}^1\times {\mathrm{211}}^1$

素因数の和:376

約数の個数: 64

約数和(自身を含む): 49862400

約数和(自身を除く): 28510888

約数列:

[1, 2, 4, 7, 8, 13, 14, 26, 28, 52, 56, 91, 104, 139, 182, 211, 278, 364, 422, 556, 728, 844, 973, 1112, 1477, 1688, 1807, 1946, 2743, 2954, 3614, 3892, 5486, 5908, 7228, 7784, 10972, 11816, 12649, 14456, 19201, 21944, 25298, 29329, 38402, 50596, 58658, 76804, 101192, 117316, 153608, 205303, 234632, 381277, 410606, 762554, 821212, 1525108, 1642424, 2668939, 3050216, 5337878, 10675756, 21351512]

約数ペア:

[(1, 21351512), (2, 10675756), (4, 5337878), (7, 3050216), (8, 2668939), (13, 1642424), (14, 1525108), (26, 821212), (28, 762554), (52, 410606), (56, 381277), (91, 234632), (104, 205303), (139, 153608), (182, 117316), (211, 101192), (278, 76804), (364, 58658), (422, 50596), (556, 38402), (728, 29329), (844, 25298), (973, 21944), (1112, 19201), (1477, 14456), (1688, 12649), (1807, 11816), (1946, 10972), (2743, 7784), (2954, 7228), (3614, 5908), (3892, 5486)]