21000228207

素因数分解:

$3^1\times 7^1\times {\mathrm{73}}^1\times {\mathrm{271}}^1\times {\mathrm{50549}}^1$

素因数の和:50903

約数の個数: 32

約数和(自身を含む): 32559052800

約数和(自身を除く): 11558824593

約数列:

[1, 3, 7, 21, 73, 219, 271, 511, 813, 1533, 1897, 5691, 19783, 50549, 59349, 138481, 151647, 353843, 415443, 1061529, 3690077, 11070231, 13698779, 25830539, 41096337, 77491617, 95891453, 287674359, 1000010867, 3000032601, 7000076069, 21000228207]

約数ペア:

[(1, 21000228207), (3, 7000076069), (7, 3000032601), (21, 1000010867), (73, 287674359), (219, 95891453), (271, 77491617), (511, 41096337), (813, 25830539), (1533, 13698779), (1897, 11070231), (5691, 3690077), (19783, 1061529), (50549, 415443), (59349, 353843), (138481, 151647)]