31991421

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{197}}^1$

素因数の和:274

約数の個数: 64

約数和(自身を含む): 57784320

約数和(自身を除く): 25792899

約数列:

[1, 3, 7, 11, 19, 21, 33, 37, 57, 77, 111, 133, 197, 209, 231, 259, 399, 407, 591, 627, 703, 777, 1221, 1379, 1463, 2109, 2167, 2849, 3743, 4137, 4389, 4921, 6501, 7289, 7733, 8547, 11229, 14763, 15169, 21867, 23199, 26201, 41173, 45507, 51023, 54131, 78603, 80179, 123519, 138491, 153069, 162393, 240537, 288211, 415473, 561253, 864633, 969437, 1523401, 1683759, 2908311, 4570203, 10663807, 31991421]

約数ペア:

[(1, 31991421), (3, 10663807), (7, 4570203), (11, 2908311), (19, 1683759), (21, 1523401), (33, 969437), (37, 864633), (57, 561253), (77, 415473), (111, 288211), (133, 240537), (197, 162393), (209, 153069), (231, 138491), (259, 123519), (399, 80179), (407, 78603), (591, 54131), (627, 51023), (703, 45507), (777, 41173), (1221, 26201), (1379, 23199), (1463, 21867), (2109, 15169), (2167, 14763), (2849, 11229), (3743, 8547), (4137, 7733), (4389, 7289), (4921, 6501)]