21557988

素因数分解:

$2^2\times 3^6\times {\mathrm{7393}}^1$

素因数の和:7415

約数の個数: 42

約数和(自身を含む): 56571494

約数和(自身を除く): 35013506

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 27, 36, 54, 81, 108, 162, 243, 324, 486, 729, 972, 1458, 2916, 7393, 14786, 22179, 29572, 44358, 66537, 88716, 133074, 199611, 266148, 399222, 598833, 798444, 1197666, 1796499, 2395332, 3592998, 5389497, 7185996, 10778994, 21557988]

約数ペア:

[(1, 21557988), (2, 10778994), (3, 7185996), (4, 5389497), (6, 3592998), (9, 2395332), (12, 1796499), (18, 1197666), (27, 798444), (36, 598833), (54, 399222), (81, 266148), (108, 199611), (162, 133074), (243, 88716), (324, 66537), (486, 44358), (729, 29572), (972, 22179), (1458, 14786), (2916, 7393)]