21020913

素因数分解:

$3^2\times {\mathrm{53}}^1\times {\mathrm{127}}^1\times {\mathrm{347}}^1$

素因数の和:533

約数の個数: 24

約数和(自身を含む): 31269888

約数和(自身を除く): 10248975

約数列:

[1, 3, 9, 53, 127, 159, 347, 381, 477, 1041, 1143, 3123, 6731, 18391, 20193, 44069, 55173, 60579, 132207, 165519, 396621, 2335657, 7006971, 21020913]

約数ペア:

[(1, 21020913), (3, 7006971), (9, 2335657), (53, 396621), (127, 165519), (159, 132207), (347, 60579), (381, 55173), (477, 44069), (1041, 20193), (1143, 18391), (3123, 6731)]