21905961

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^2\times {\mathrm{37}}^1\times {\mathrm{233}}^1$

素因数の和:302

約数の個数: 48

約数和(自身を含む): 37844352

約数和(自身を除く): 15938391

約数列:

[1, 3, 7, 11, 21, 33, 37, 77, 111, 121, 231, 233, 259, 363, 407, 699, 777, 847, 1221, 1631, 2541, 2563, 2849, 4477, 4893, 7689, 8547, 8621, 13431, 17941, 25863, 28193, 31339, 53823, 60347, 84579, 94017, 94831, 181041, 197351, 284493, 592053, 663817, 1043141, 1991451, 3129423, 7301987, 21905961]

約数ペア:

[(1, 21905961), (3, 7301987), (7, 3129423), (11, 1991451), (21, 1043141), (33, 663817), (37, 592053), (77, 284493), (111, 197351), (121, 181041), (231, 94831), (233, 94017), (259, 84579), (363, 60347), (407, 53823), (699, 31339), (777, 28193), (847, 25863), (1221, 17941), (1631, 13431), (2541, 8621), (2563, 8547), (2849, 7689), (4477, 4893)]