20972133

素因数分解:

$3^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{883}}^1$

素因数の和:938

約数の個数: 48

約数和(自身を含む): 38613120

約数和(自身を除く): 17640987

約数列:

[1, 3, 7, 9, 13, 21, 29, 39, 63, 87, 91, 117, 203, 261, 273, 377, 609, 819, 883, 1131, 1827, 2639, 2649, 3393, 6181, 7917, 7947, 11479, 18543, 23751, 25607, 34437, 55629, 76821, 80353, 103311, 179249, 230463, 241059, 332891, 537747, 723177, 998673, 1613241, 2330237, 2996019, 6990711, 20972133]

約数ペア:

[(1, 20972133), (3, 6990711), (7, 2996019), (9, 2330237), (13, 1613241), (21, 998673), (29, 723177), (39, 537747), (63, 332891), (87, 241059), (91, 230463), (117, 179249), (203, 103311), (261, 80353), (273, 76821), (377, 55629), (609, 34437), (819, 25607), (883, 23751), (1131, 18543), (1827, 11479), (2639, 7947), (2649, 7917), (3393, 6181)]