18971253

素因数分解:

$3^5\times 7^1\times {\mathrm{19}}^1\times {\mathrm{587}}^1$

素因数の和:628

約数の個数: 48

約数和(自身を含む): 34245120

約数和(自身を除く): 15273867

約数列:

[1, 3, 7, 9, 19, 21, 27, 57, 63, 81, 133, 171, 189, 243, 399, 513, 567, 587, 1197, 1539, 1701, 1761, 3591, 4109, 4617, 5283, 10773, 11153, 12327, 15849, 32319, 33459, 36981, 47547, 78071, 100377, 110943, 142641, 234213, 301131, 332829, 702639, 903393, 998487, 2107917, 2710179, 6323751, 18971253]

約数ペア:

[(1, 18971253), (3, 6323751), (7, 2710179), (9, 2107917), (19, 998487), (21, 903393), (27, 702639), (57, 332829), (63, 301131), (81, 234213), (133, 142641), (171, 110943), (189, 100377), (243, 78071), (399, 47547), (513, 36981), (567, 33459), (587, 32319), (1197, 15849), (1539, 12327), (1701, 11153), (1761, 10773), (3591, 5283), (4109, 4617)]