20730905

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{73}}^1\times {\mathrm{257}}^1$

素因数の和:365

約数の個数: 32

約数和(自身を含む): 28867104

約数和(自身を除く): 8136199

約数列:

[1, 5, 13, 17, 65, 73, 85, 221, 257, 365, 949, 1105, 1241, 1285, 3341, 4369, 4745, 6205, 16133, 16705, 18761, 21845, 56797, 80665, 93805, 243893, 283985, 318937, 1219465, 1594685, 4146181, 20730905]

約数ペア:

[(1, 20730905), (5, 4146181), (13, 1594685), (17, 1219465), (65, 318937), (73, 283985), (85, 243893), (221, 93805), (257, 80665), (365, 56797), (949, 21845), (1105, 18761), (1241, 16705), (1285, 16133), (3341, 6205), (4369, 4745)]