21304959

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{59}}^1\times {\mathrm{197}}^1$

素因数の和:319

約数の個数: 32

約数和(自身を含む): 31933440

約数和(自身を除く): 10628481

約数列:

[1, 3, 13, 39, 47, 59, 141, 177, 197, 591, 611, 767, 1833, 2301, 2561, 2773, 7683, 8319, 9259, 11623, 27777, 34869, 36049, 108147, 120367, 151099, 361101, 453297, 546281, 1638843, 7101653, 21304959]

約数ペア:

[(1, 21304959), (3, 7101653), (13, 1638843), (39, 546281), (47, 453297), (59, 361101), (141, 151099), (177, 120367), (197, 108147), (591, 36049), (611, 34869), (767, 27777), (1833, 11623), (2301, 9259), (2561, 8319), (2773, 7683)]