21312837

素因数分解:

$3^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{491}}^1$

素因数の和:570

約数の個数: 48

約数和(自身を含む): 38683008

約数和(自身を除く): 17370171

約数列:

[1, 3, 7, 9, 13, 21, 39, 53, 63, 91, 117, 159, 273, 371, 477, 491, 689, 819, 1113, 1473, 2067, 3339, 3437, 4419, 4823, 6201, 6383, 10311, 14469, 19149, 26023, 30933, 43407, 44681, 57447, 78069, 134043, 182161, 234207, 338299, 402129, 546483, 1014897, 1639449, 2368093, 3044691, 7104279, 21312837]

約数ペア:

[(1, 21312837), (3, 7104279), (7, 3044691), (9, 2368093), (13, 1639449), (21, 1014897), (39, 546483), (53, 402129), (63, 338299), (91, 234207), (117, 182161), (159, 134043), (273, 78069), (371, 57447), (477, 44681), (491, 43407), (689, 30933), (819, 26023), (1113, 19149), (1473, 14469), (2067, 10311), (3339, 6383), (3437, 6201), (4419, 4823)]