21160880

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{20347}}^1$

素因数の和:20373

約数の個数: 40

約数和(自身を含む): 52986192

約数和(自身を除く): 31825312

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 20347, 40694, 81388, 101735, 162776, 203470, 264511, 325552, 406940, 529022, 813880, 1058044, 1322555, 1627760, 2116088, 2645110, 4232176, 5290220, 10580440, 21160880]

約数ペア:

[(1, 21160880), (2, 10580440), (4, 5290220), (5, 4232176), (8, 2645110), (10, 2116088), (13, 1627760), (16, 1322555), (20, 1058044), (26, 813880), (40, 529022), (52, 406940), (65, 325552), (80, 264511), (104, 203470), (130, 162776), (208, 101735), (260, 81388), (520, 40694), (1040, 20347)]