20987660

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{17203}}^1$

素因数の和:17273

約数の個数: 24

約数和(自身を含む): 44799216

約数和(自身を除く): 23811556

約数列:

[1, 2, 4, 5, 10, 20, 61, 122, 244, 305, 610, 1220, 17203, 34406, 68812, 86015, 172030, 344060, 1049383, 2098766, 4197532, 5246915, 10493830, 20987660]

約数ペア:

[(1, 20987660), (2, 10493830), (4, 5246915), (5, 4197532), (10, 2098766), (20, 1049383), (61, 344060), (122, 172030), (244, 86015), (305, 68812), (610, 34406), (1220, 17203)]