19665525

素因数分解:

$3^1\times 5^2\times {\mathrm{11}}^3\times {\mathrm{197}}^1$

素因数の和:243

約数の個数: 48

約数和(自身を含む): 35944128

約数和(自身を除く): 16278603

約数列:

[1, 3, 5, 11, 15, 25, 33, 55, 75, 121, 165, 197, 275, 363, 591, 605, 825, 985, 1331, 1815, 2167, 2955, 3025, 3993, 4925, 6501, 6655, 9075, 10835, 14775, 19965, 23837, 32505, 33275, 54175, 71511, 99825, 119185, 162525, 262207, 357555, 595925, 786621, 1311035, 1787775, 3933105, 6555175, 19665525]

約数ペア:

[(1, 19665525), (3, 6555175), (5, 3933105), (11, 1787775), (15, 1311035), (25, 786621), (33, 595925), (55, 357555), (75, 262207), (121, 162525), (165, 119185), (197, 99825), (275, 71511), (363, 54175), (591, 33275), (605, 32505), (825, 23837), (985, 19965), (1331, 14775), (1815, 10835), (2167, 9075), (2955, 6655), (3025, 6501), (3993, 4925)]