21990959978

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{823}}^1\times {\mathrm{13009}}^1$

素因数の和:13926

約数の個数: 32

約数和(自身を含む): 36020006400

約数和(自身を除く): 14029046422

約数列:

[1, 2, 13, 26, 79, 158, 823, 1027, 1646, 2054, 10699, 13009, 21398, 26018, 65017, 130034, 169117, 338234, 845221, 1027711, 1690442, 2055422, 10706407, 13360243, 21412814, 26720486, 139183291, 278366582, 845806153, 1691612306, 10995479989, 21990959978]

約数ペア:

[(1, 21990959978), (2, 10995479989), (13, 1691612306), (26, 845806153), (79, 278366582), (158, 139183291), (823, 26720486), (1027, 21412814), (1646, 13360243), (2054, 10706407), (10699, 2055422), (13009, 1690442), (21398, 1027711), (26018, 845221), (65017, 338234), (130034, 169117)]