21792385

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{71}}^1\times {\mathrm{157}}^1$

素因数の和:273

約数の個数: 32

約数和(自身を含む): 29486592

約数和(自身を除く): 7694207

約数列:

[1, 5, 17, 23, 71, 85, 115, 157, 355, 391, 785, 1207, 1633, 1955, 2669, 3611, 6035, 8165, 11147, 13345, 18055, 27761, 55735, 61387, 138805, 189499, 256381, 306935, 947495, 1281905, 4358477, 21792385]

約数ペア:

[(1, 21792385), (5, 4358477), (17, 1281905), (23, 947495), (71, 306935), (85, 256381), (115, 189499), (157, 138805), (355, 61387), (391, 55735), (785, 27761), (1207, 18055), (1633, 13345), (1955, 11147), (2669, 8165), (3611, 6035)]