20998964

素因数分解:

$2^2\times 7^1\times {\mathrm{43}}^1\times {\mathrm{107}}^1\times {\mathrm{163}}^1$

素因数の和:324

約数の個数: 48

約数和(自身を含む): 43642368

約数和(自身を除く): 22643404

約数列:

[1, 2, 4, 7, 14, 28, 43, 86, 107, 163, 172, 214, 301, 326, 428, 602, 652, 749, 1141, 1204, 1498, 2282, 2996, 4564, 4601, 7009, 9202, 14018, 17441, 18404, 28036, 32207, 34882, 49063, 64414, 69764, 98126, 122087, 128828, 196252, 244174, 488348, 749963, 1499926, 2999852, 5249741, 10499482, 20998964]

約数ペア:

[(1, 20998964), (2, 10499482), (4, 5249741), (7, 2999852), (14, 1499926), (28, 749963), (43, 488348), (86, 244174), (107, 196252), (163, 128828), (172, 122087), (214, 98126), (301, 69764), (326, 64414), (428, 49063), (602, 34882), (652, 32207), (749, 28036), (1141, 18404), (1204, 17441), (1498, 14018), (2282, 9202), (2996, 7009), (4564, 4601)]