21251593727

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{613}}^1\times {\mathrm{20051}}^1$

素因数の和:20703

約数の個数: 32

約数和(自身を含む): 27578718720

約数和(自身を除く): 6327124993

約数列:

[1, 7, 13, 19, 91, 133, 247, 613, 1729, 4291, 7969, 11647, 20051, 55783, 81529, 140357, 151411, 260663, 380969, 1059877, 1824641, 2666783, 4952597, 12291263, 34668179, 86038841, 159786419, 233533997, 1118504933, 1634737979, 3035941961, 21251593727]

約数ペア:

[(1, 21251593727), (7, 3035941961), (13, 1634737979), (19, 1118504933), (91, 233533997), (133, 159786419), (247, 86038841), (613, 34668179), (1729, 12291263), (4291, 4952597), (7969, 2666783), (11647, 1824641), (20051, 1059877), (55783, 380969), (81529, 260663), (140357, 151411)]