20809156

素因数分解:

$2^2\times {\mathrm{17}}^2\times {\mathrm{47}}^1\times {\mathrm{383}}^1$

素因数の和:468

約数の個数: 36

約数和(自身を含む): 39610368

約数和(自身を除く): 18801212

約数列:

[1, 2, 4, 17, 34, 47, 68, 94, 188, 289, 383, 578, 766, 799, 1156, 1532, 1598, 3196, 6511, 13022, 13583, 18001, 26044, 27166, 36002, 54332, 72004, 110687, 221374, 306017, 442748, 612034, 1224068, 5202289, 10404578, 20809156]

約数ペア:

[(1, 20809156), (2, 10404578), (4, 5202289), (17, 1224068), (34, 612034), (47, 442748), (68, 306017), (94, 221374), (188, 110687), (289, 72004), (383, 54332), (578, 36002), (766, 27166), (799, 26044), (1156, 18001), (1532, 13583), (1598, 13022), (3196, 6511)]