19970825

素因数分解:

$5^2\times 7^1\times {\mathrm{139}}^1\times {\mathrm{821}}^1$

素因数の和:977

約数の個数: 24

約数和(自身を含む): 28539840

約数和(自身を除く): 8569015

約数列:

[1, 5, 7, 25, 35, 139, 175, 695, 821, 973, 3475, 4105, 4865, 5747, 20525, 24325, 28735, 114119, 143675, 570595, 798833, 2852975, 3994165, 19970825]

約数ペア:

[(1, 19970825), (5, 3994165), (7, 2852975), (25, 798833), (35, 570595), (139, 143675), (175, 114119), (695, 28735), (821, 24325), (973, 20525), (3475, 5747), (4105, 4865)]