20828988

素因数分解:

$2^2\times 3^7\times {\mathrm{2381}}^1$

素因数の和:2406

約数の個数: 48

約数和(自身を含む): 54690720

約数和(自身を除く): 33861732

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 27, 36, 54, 81, 108, 162, 243, 324, 486, 729, 972, 1458, 2187, 2381, 2916, 4374, 4762, 7143, 8748, 9524, 14286, 21429, 28572, 42858, 64287, 85716, 128574, 192861, 257148, 385722, 578583, 771444, 1157166, 1735749, 2314332, 3471498, 5207247, 6942996, 10414494, 20828988]

約数ペア:

[(1, 20828988), (2, 10414494), (3, 6942996), (4, 5207247), (6, 3471498), (9, 2314332), (12, 1735749), (18, 1157166), (27, 771444), (36, 578583), (54, 385722), (81, 257148), (108, 192861), (162, 128574), (243, 85716), (324, 64287), (486, 42858), (729, 28572), (972, 21429), (1458, 14286), (2187, 9524), (2381, 8748), (2916, 7143), (4374, 4762)]