21819721

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{79}}^1\times {\mathrm{211}}^1$

素因数の和:325

約数の個数: 32

約数和(自身を含む): 29306880

約数和(自身を除く): 7487159

約数列:

[1, 7, 11, 17, 77, 79, 119, 187, 211, 553, 869, 1309, 1343, 1477, 2321, 3587, 6083, 9401, 14773, 16247, 16669, 25109, 39457, 103411, 116683, 183359, 276199, 283373, 1283513, 1983611, 3117103, 21819721]

約数ペア:

[(1, 21819721), (7, 3117103), (11, 1983611), (17, 1283513), (77, 283373), (79, 276199), (119, 183359), (187, 116683), (211, 103411), (553, 39457), (869, 25109), (1309, 16669), (1343, 16247), (1477, 14773), (2321, 9401), (3587, 6083)]