21127685

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{101}}^1\times {\mathrm{107}}^1$

素因数の和:253

約数の個数: 32

約数和(自身を含む): 28553472

約数和(自身を除く): 7425787

約数列:

[1, 5, 17, 23, 85, 101, 107, 115, 391, 505, 535, 1717, 1819, 1955, 2323, 2461, 8585, 9095, 10807, 11615, 12305, 39491, 41837, 54035, 183719, 197455, 209185, 248561, 918595, 1242805, 4225537, 21127685]

約数ペア:

[(1, 21127685), (5, 4225537), (17, 1242805), (23, 918595), (85, 248561), (101, 209185), (107, 197455), (115, 183719), (391, 54035), (505, 41837), (535, 39491), (1717, 12305), (1819, 11615), (1955, 10807), (2323, 9095), (2461, 8585)]