20189897

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{421}}^1$

素因数の和:489

約数の個数: 32

約数和(自身を含む): 27224064

約数和(自身を除く): 7034167

約数列:

[1, 7, 13, 17, 31, 91, 119, 217, 221, 403, 421, 527, 1547, 2821, 2947, 3689, 5473, 6851, 7157, 13051, 38311, 47957, 50099, 91357, 93041, 169663, 221867, 651287, 1187641, 1553069, 2884271, 20189897]

約数ペア:

[(1, 20189897), (7, 2884271), (13, 1553069), (17, 1187641), (31, 651287), (91, 221867), (119, 169663), (217, 93041), (221, 91357), (403, 50099), (421, 47957), (527, 38311), (1547, 13051), (2821, 7157), (2947, 6851), (3689, 5473)]