20991538240

素因数分解:

$2^6\times 5^1\times {\mathrm{1091}}^1\times {\mathrm{60127}}^1$

素因数の和:61235

約数の個数: 56

約数和(自身を含む): 50032749312

約数和(自身を除く): 29041211072

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 1091, 2182, 4364, 5455, 8728, 10910, 17456, 21820, 34912, 43640, 60127, 69824, 87280, 120254, 174560, 240508, 300635, 349120, 481016, 601270, 962032, 1202540, 1924064, 2405080, 3848128, 4810160, 9620320, 19240640, 65598557, 131197114, 262394228, 327992785, 524788456, 655985570, 1049576912, 1311971140, 2099153824, 2623942280, 4198307648, 5247884560, 10495769120, 20991538240]

約数ペア:

[(1, 20991538240), (2, 10495769120), (4, 5247884560), (5, 4198307648), (8, 2623942280), (10, 2099153824), (16, 1311971140), (20, 1049576912), (32, 655985570), (40, 524788456), (64, 327992785), (80, 262394228), (160, 131197114), (320, 65598557), (1091, 19240640), (2182, 9620320), (4364, 4810160), (5455, 3848128), (8728, 2405080), (10910, 1924064), (17456, 1202540), (21820, 962032), (34912, 601270), (43640, 481016), (60127, 349120), (69824, 300635), (87280, 240508), (120254, 174560)]