21123775

素因数分解:

$5^2\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{2161}}^1$

素因数の和:2211

約数の個数: 24

約数和(自身を含む): 28953504

約数和(自身を除く): 7829729

約数列:

[1, 5, 17, 23, 25, 85, 115, 391, 425, 575, 1955, 2161, 9775, 10805, 36737, 49703, 54025, 183685, 248515, 844951, 918425, 1242575, 4224755, 21123775]

約数ペア:

[(1, 21123775), (5, 4224755), (17, 1242575), (23, 918425), (25, 844951), (85, 248515), (115, 183685), (391, 54025), (425, 49703), (575, 36737), (1955, 10805), (2161, 9775)]