20381368

素因数分解:

$2^3\times 7^1\times {\mathrm{17}}^1\times {\mathrm{79}}^1\times {\mathrm{271}}^1$

素因数の和:380

約数の個数: 64

約数和(自身を含む): 47001600

約数和(自身を除く): 26620232

約数列:

[1, 2, 4, 7, 8, 14, 17, 28, 34, 56, 68, 79, 119, 136, 158, 238, 271, 316, 476, 542, 553, 632, 952, 1084, 1106, 1343, 1897, 2168, 2212, 2686, 3794, 4424, 4607, 5372, 7588, 9214, 9401, 10744, 15176, 18428, 18802, 21409, 32249, 36856, 37604, 42818, 64498, 75208, 85636, 128996, 149863, 171272, 257992, 299726, 363953, 599452, 727906, 1198904, 1455812, 2547671, 2911624, 5095342, 10190684, 20381368]

約数ペア:

[(1, 20381368), (2, 10190684), (4, 5095342), (7, 2911624), (8, 2547671), (14, 1455812), (17, 1198904), (28, 727906), (34, 599452), (56, 363953), (68, 299726), (79, 257992), (119, 171272), (136, 149863), (158, 128996), (238, 85636), (271, 75208), (316, 64498), (476, 42818), (542, 37604), (553, 36856), (632, 32249), (952, 21409), (1084, 18802), (1106, 18428), (1343, 15176), (1897, 10744), (2168, 9401), (2212, 9214), (2686, 7588), (3794, 5372), (4424, 4607)]