21581517892

素因数分解:

$2^2\times {\mathrm{11}}^2\times {\mathrm{113}}^1\times {\mathrm{394601}}^1$

素因数の和:394740

約数の個数: 36

約数和(自身を含む): 41880688668

約数和(自身を除く): 20299170776

約数列:

[1, 2, 4, 11, 22, 44, 113, 121, 226, 242, 452, 484, 1243, 2486, 4972, 13673, 27346, 54692, 394601, 789202, 1578404, 4340611, 8681222, 17362444, 44589913, 47746721, 89179826, 95493442, 178359652, 190986884, 490489043, 980978086, 1961956172, 5395379473, 10790758946, 21581517892]

約数ペア:

[(1, 21581517892), (2, 10790758946), (4, 5395379473), (11, 1961956172), (22, 980978086), (44, 490489043), (113, 190986884), (121, 178359652), (226, 95493442), (242, 89179826), (452, 47746721), (484, 44589913), (1243, 17362444), (2486, 8681222), (4972, 4340611), (13673, 1578404), (27346, 789202), (54692, 394601)]