28378480

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^2\times {\mathrm{2099}}^1$

素因数の和:2138

約数の個数: 60

約数和(自身を含む): 71479800

約数和(自身を除く): 43101320

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 169, 208, 260, 338, 520, 676, 845, 1040, 1352, 1690, 2099, 2704, 3380, 4198, 6760, 8396, 10495, 13520, 16792, 20990, 27287, 33584, 41980, 54574, 83960, 109148, 136435, 167920, 218296, 272870, 354731, 436592, 545740, 709462, 1091480, 1418924, 1773655, 2182960, 2837848, 3547310, 5675696, 7094620, 14189240, 28378480]

約数ペア:

[(1, 28378480), (2, 14189240), (4, 7094620), (5, 5675696), (8, 3547310), (10, 2837848), (13, 2182960), (16, 1773655), (20, 1418924), (26, 1091480), (40, 709462), (52, 545740), (65, 436592), (80, 354731), (104, 272870), (130, 218296), (169, 167920), (208, 136435), (260, 109148), (338, 83960), (520, 54574), (676, 41980), (845, 33584), (1040, 27287), (1352, 20990), (1690, 16792), (2099, 13520), (2704, 10495), (3380, 8396), (4198, 6760)]