21456745

素因数分解:

$5^1\times {\mathrm{83}}^1\times {\mathrm{149}}^1\times {\mathrm{347}}^1$

素因数の和:584

約数の個数: 16

約数和(自身を含む): 26308800

約数和(自身を除く): 4852055

約数列:

[1, 5, 83, 149, 347, 415, 745, 1735, 12367, 28801, 51703, 61835, 144005, 258515, 4291349, 21456745]

約数ペア:

[(1, 21456745), (5, 4291349), (83, 258515), (149, 144005), (347, 61835), (415, 51703), (745, 28801), (1735, 12367)]