21331281

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{53}}^1\times {\mathrm{307}}^1$

素因数の和:405

約数の個数: 32

約数和(自身を含む): 31933440

約数和(自身を除く): 10602159

約数列:

[1, 3, 19, 23, 53, 57, 69, 159, 307, 437, 921, 1007, 1219, 1311, 3021, 3657, 5833, 7061, 16271, 17499, 21183, 23161, 48813, 69483, 134159, 309149, 374233, 402477, 927447, 1122699, 7110427, 21331281]

約数ペア:

[(1, 21331281), (3, 7110427), (19, 1122699), (23, 927447), (53, 402477), (57, 374233), (69, 309149), (159, 134159), (307, 69483), (437, 48813), (921, 23161), (1007, 21183), (1219, 17499), (1311, 16271), (3021, 7061), (3657, 5833)]