18393921

素因数分解:

$3^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{607}}^1$

素因数の和:670

約数の個数: 48

約数和(自身を含む): 33639424

約数和(自身を除く): 15245503

約数列:

[1, 3, 7, 9, 13, 21, 37, 39, 63, 91, 111, 117, 259, 273, 333, 481, 607, 777, 819, 1443, 1821, 2331, 3367, 4249, 4329, 5463, 7891, 10101, 12747, 22459, 23673, 30303, 38241, 55237, 67377, 71019, 157213, 165711, 202131, 291967, 471639, 497133, 875901, 1414917, 2043769, 2627703, 6131307, 18393921]

約数ペア:

[(1, 18393921), (3, 6131307), (7, 2627703), (9, 2043769), (13, 1414917), (21, 875901), (37, 497133), (39, 471639), (63, 291967), (91, 202131), (111, 165711), (117, 157213), (259, 71019), (273, 67377), (333, 55237), (481, 38241), (607, 30303), (777, 23673), (819, 22459), (1443, 12747), (1821, 10101), (2331, 7891), (3367, 5463), (4249, 4329)]