20197779

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{223}}^1\times {\mathrm{227}}^1$

素因数の和:479

約数の個数: 32

約数和(自身を含む): 32686080

約数和(自身を除く): 12488301

約数列:

[1, 3, 7, 19, 21, 57, 133, 223, 227, 399, 669, 681, 1561, 1589, 4237, 4313, 4683, 4767, 12711, 12939, 29659, 30191, 50621, 88977, 90573, 151863, 354347, 961799, 1063041, 2885397, 6732593, 20197779]

約数ペア:

[(1, 20197779), (3, 6732593), (7, 2885397), (19, 1063041), (21, 961799), (57, 354347), (133, 151863), (223, 90573), (227, 88977), (399, 50621), (669, 30191), (681, 29659), (1561, 12939), (1589, 12711), (4237, 4767), (4313, 4683)]