20390188

素因数分解:

$2^2\times 7^1\times {\mathrm{13}}^2\times {\mathrm{31}}^1\times {\mathrm{139}}^1$

素因数の和:207

約数の個数: 72

約数和(自身を含む): 45911040

約数和(自身を除く): 25520852

約数列:

[1, 2, 4, 7, 13, 14, 26, 28, 31, 52, 62, 91, 124, 139, 169, 182, 217, 278, 338, 364, 403, 434, 556, 676, 806, 868, 973, 1183, 1612, 1807, 1946, 2366, 2821, 3614, 3892, 4309, 4732, 5239, 5642, 7228, 8618, 10478, 11284, 12649, 17236, 20956, 23491, 25298, 30163, 36673, 46982, 50596, 56017, 60326, 73346, 93964, 112034, 120652, 146692, 164437, 224068, 328874, 392119, 657748, 728221, 784238, 1456442, 1568476, 2912884, 5097547, 10195094, 20390188]

約数ペア:

[(1, 20390188), (2, 10195094), (4, 5097547), (7, 2912884), (13, 1568476), (14, 1456442), (26, 784238), (28, 728221), (31, 657748), (52, 392119), (62, 328874), (91, 224068), (124, 164437), (139, 146692), (169, 120652), (182, 112034), (217, 93964), (278, 73346), (338, 60326), (364, 56017), (403, 50596), (434, 46982), (556, 36673), (676, 30163), (806, 25298), (868, 23491), (973, 20956), (1183, 17236), (1612, 12649), (1807, 11284), (1946, 10478), (2366, 8618), (2821, 7228), (3614, 5642), (3892, 5239), (4309, 4732)]