19728925

素因数分解:

$5^2\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{761}}^1$

素因数の和:849

約数の個数: 24

約数和(自身を含む): 26362152

約数和(自身を除く): 6633227

約数列:

[1, 5, 17, 25, 61, 85, 305, 425, 761, 1037, 1525, 3805, 5185, 12937, 19025, 25925, 46421, 64685, 232105, 323425, 789157, 1160525, 3945785, 19728925]

約数ペア:

[(1, 19728925), (5, 3945785), (17, 1160525), (25, 789157), (61, 323425), (85, 232105), (305, 64685), (425, 46421), (761, 25925), (1037, 19025), (1525, 12937), (3805, 5185)]