20915792

素因数分解:

$2^4\times {\mathrm{67}}^1\times {\mathrm{109}}^1\times {\mathrm{179}}^1$

素因数の和:363

約数の個数: 40

約数和(自身を含む): 41738400

約数和(自身を除く): 20822608

約数列:

[1, 2, 4, 8, 16, 67, 109, 134, 179, 218, 268, 358, 436, 536, 716, 872, 1072, 1432, 1744, 2864, 7303, 11993, 14606, 19511, 23986, 29212, 39022, 47972, 58424, 78044, 95944, 116848, 156088, 191888, 312176, 1307237, 2614474, 5228948, 10457896, 20915792]

約数ペア:

[(1, 20915792), (2, 10457896), (4, 5228948), (8, 2614474), (16, 1307237), (67, 312176), (109, 191888), (134, 156088), (179, 116848), (218, 95944), (268, 78044), (358, 58424), (436, 47972), (536, 39022), (716, 29212), (872, 23986), (1072, 19511), (1432, 14606), (1744, 11993), (2864, 7303)]