21679775

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{1627}}^1$

素因数の和:1691

約数の個数: 24

約数和(自身を含む): 29675184

約数和(自身を除く): 7995409

約数列:

[1, 5, 13, 25, 41, 65, 205, 325, 533, 1025, 1627, 2665, 8135, 13325, 21151, 40675, 66707, 105755, 333535, 528775, 867191, 1667675, 4335955, 21679775]

約数ペア:

[(1, 21679775), (5, 4335955), (13, 1667675), (25, 867191), (41, 528775), (65, 333535), (205, 105755), (325, 66707), (533, 40675), (1025, 21151), (1627, 13325), (2665, 8135)]