21180874

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{2389}}^1$

素因数の和:2446

約数の個数: 32

約数和(自身を含む): 38545920

約数和(自身を除く): 17365046

約数列:

[1, 2, 11, 13, 22, 26, 31, 62, 143, 286, 341, 403, 682, 806, 2389, 4433, 4778, 8866, 26279, 31057, 52558, 62114, 74059, 148118, 341627, 683254, 814649, 962767, 1629298, 1925534, 10590437, 21180874]

約数ペア:

[(1, 21180874), (2, 10590437), (11, 1925534), (13, 1629298), (22, 962767), (26, 814649), (31, 683254), (62, 341627), (143, 148118), (286, 74059), (341, 62114), (403, 52558), (682, 31057), (806, 26279), (2389, 8866), (4433, 4778)]