28721420

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{367}}^1$

素因数の和:439

約数の個数: 96

約数和(自身を含む): 76167168

約数和(自身を除く): 47445748

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 43, 52, 65, 70, 86, 91, 130, 140, 172, 182, 215, 260, 301, 364, 367, 430, 455, 559, 602, 734, 860, 910, 1118, 1204, 1468, 1505, 1820, 1835, 2236, 2569, 2795, 3010, 3670, 3913, 4771, 5138, 5590, 6020, 7340, 7826, 9542, 10276, 11180, 12845, 15652, 15781, 19084, 19565, 23855, 25690, 31562, 33397, 39130, 47710, 51380, 63124, 66794, 78260, 78905, 95420, 110467, 133588, 157810, 166985, 205153, 220934, 315620, 333970, 410306, 441868, 552335, 667940, 820612, 1025765, 1104670, 1436071, 2051530, 2209340, 2872142, 4103060, 5744284, 7180355, 14360710, 28721420]

約数ペア:

[(1, 28721420), (2, 14360710), (4, 7180355), (5, 5744284), (7, 4103060), (10, 2872142), (13, 2209340), (14, 2051530), (20, 1436071), (26, 1104670), (28, 1025765), (35, 820612), (43, 667940), (52, 552335), (65, 441868), (70, 410306), (86, 333970), (91, 315620), (130, 220934), (140, 205153), (172, 166985), (182, 157810), (215, 133588), (260, 110467), (301, 95420), (364, 78905), (367, 78260), (430, 66794), (455, 63124), (559, 51380), (602, 47710), (734, 39130), (860, 33397), (910, 31562), (1118, 25690), (1204, 23855), (1468, 19565), (1505, 19084), (1820, 15781), (1835, 15652), (2236, 12845), (2569, 11180), (2795, 10276), (3010, 9542), (3670, 7826), (3913, 7340), (4771, 6020), (5138, 5590)]