81977385

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{21101}}^1$

素因数の和:21153

約数の個数: 32

約数和(自身を含む): 153960192

約数和(自身を除く): 71982807

約数列:

[1, 3, 5, 7, 15, 21, 35, 37, 105, 111, 185, 259, 555, 777, 1295, 3885, 21101, 63303, 105505, 147707, 316515, 443121, 738535, 780737, 2215605, 2342211, 3903685, 5465159, 11711055, 16395477, 27325795, 81977385]

約数ペア:

[(1, 81977385), (3, 27325795), (5, 16395477), (7, 11711055), (15, 5465159), (21, 3903685), (35, 2342211), (37, 2215605), (105, 780737), (111, 738535), (185, 443121), (259, 316515), (555, 147707), (777, 105505), (1295, 63303), (3885, 21101)]