28820920

素因数分解:

$2^3\times 5^1\times {\mathrm{83}}^1\times {\mathrm{8681}}^1$

素因数の和:8775

約数の個数: 32

約数和(自身を含む): 65635920

約数和(自身を除く): 36815000

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 83, 166, 332, 415, 664, 830, 1660, 3320, 8681, 17362, 34724, 43405, 69448, 86810, 173620, 347240, 720523, 1441046, 2882092, 3602615, 5764184, 7205230, 14410460, 28820920]

約数ペア:

[(1, 28820920), (2, 14410460), (4, 7205230), (5, 5764184), (8, 3602615), (10, 2882092), (20, 1441046), (40, 720523), (83, 347240), (166, 173620), (332, 86810), (415, 69448), (664, 43405), (830, 34724), (1660, 17362), (3320, 8681)]