81369905

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{71}}^1\times {\mathrm{97}}^1\times {\mathrm{139}}^1$

素因数の和:329

約数の個数: 32

約数和(自身を含む): 106686720

約数和(自身を除く): 25316815

約数列:

[1, 5, 17, 71, 85, 97, 139, 355, 485, 695, 1207, 1649, 2363, 6035, 6887, 8245, 9869, 11815, 13483, 34435, 49345, 67415, 117079, 167773, 229211, 585395, 838865, 957293, 1146055, 4786465, 16273981, 81369905]

約数ペア:

[(1, 81369905), (5, 16273981), (17, 4786465), (71, 1146055), (85, 957293), (97, 838865), (139, 585395), (355, 229211), (485, 167773), (695, 117079), (1207, 67415), (1649, 49345), (2363, 34435), (6035, 13483), (6887, 11815), (8245, 9869)]