20574699.000000000

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{133387}}^1$

素因数の和:133413

約数の個数: 40

約数和(自身を含む): 347342352

約数和(自身を除く): 208619872

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 133387, 266774, 533548, 666935, 1067096, 1333870, 1734031, 2134192, 2667740, 3468062, 5335480, 6936124, 8670155, 10670960, 13872248, 17340310, 27744496, 34680620, 69361240, 138722480]

約数ペア:

[(1, 138722480), (2, 69361240), (4, 34680620), (5, 27744496), (8, 17340310), (10, 13872248), (13, 10670960), (16, 8670155), (20, 6936124), (26, 5335480), (40, 3468062), (52, 2667740), (65, 2134192), (80, 1734031), (104, 1333870), (130, 1067096), (208, 666935), (260, 533548), (520, 266774), (1040, 133387)]