81189740

素因数分解:

$2^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{37243}}^1$

素因数の和:37361

約数の個数: 24

約数和(自身を含む): 172067280

約数和(自身を除く): 90877540

約数列:

[1, 2, 4, 5, 10, 20, 109, 218, 436, 545, 1090, 2180, 37243, 74486, 148972, 186215, 372430, 744860, 4059487, 8118974, 16237948, 20297435, 40594870, 81189740]

約数ペア:

[(1, 81189740), (2, 40594870), (4, 20297435), (5, 16237948), (10, 8118974), (20, 4059487), (109, 744860), (218, 372430), (436, 186215), (545, 148972), (1090, 74486), (2180, 37243)]