7210100

素因数分解:

$2^2\times 5^2\times {\mathrm{72101}}^1$

素因数の和:72115

約数の個数: 18

約数和(自身を含む): 15646134

約数和(自身を除く): 8436034

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 72101, 144202, 288404, 360505, 721010, 1442020, 1802525, 3605050, 7210100]

約数ペア:

[(1, 7210100), (2, 3605050), (4, 1802525), (5, 1442020), (10, 721010), (20, 360505), (25, 288404), (50, 144202), (100, 72101)]