1388.000000

素因数分解:

$3^4\times 7^1\times {\mathrm{19}}^1\times {\mathrm{83}}^1$

素因数の和:121

約数の個数: 40

約数和(自身を含む): 1626240

約数和(自身を除く): 732081

約数列:

[1, 3, 7, 9, 19, 21, 27, 57, 63, 81, 83, 133, 171, 189, 249, 399, 513, 567, 581, 747, 1197, 1539, 1577, 1743, 2241, 3591, 4731, 5229, 6723, 10773, 11039, 14193, 15687, 33117, 42579, 47061, 99351, 127737, 298053, 894159]

約数ペア:

[(1, 894159), (3, 298053), (7, 127737), (9, 99351), (19, 47061), (21, 42579), (27, 33117), (57, 15687), (63, 14193), (81, 11039), (83, 10773), (133, 6723), (171, 5229), (189, 4731), (249, 3591), (399, 2241), (513, 1743), (567, 1577), (581, 1539), (747, 1197)]