20978793

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{19}}^2\times {\mathrm{587}}^1$

素因数の和:642

約数の個数: 36

約数和(自身を含む): 34948368

約数和(自身を除く): 13969575

約数列:

[1, 3, 9, 11, 19, 33, 57, 99, 171, 209, 361, 587, 627, 1083, 1761, 1881, 3249, 3971, 5283, 6457, 11153, 11913, 19371, 33459, 35739, 58113, 100377, 122683, 211907, 368049, 635721, 1104147, 1907163, 2330977, 6992931, 20978793]

約数ペア:

[(1, 20978793), (3, 6992931), (9, 2330977), (11, 1907163), (19, 1104147), (33, 635721), (57, 368049), (99, 211907), (171, 122683), (209, 100377), (361, 58113), (587, 35739), (627, 33459), (1083, 19371), (1761, 11913), (1881, 11153), (3249, 6457), (3971, 5283)]