21087549

素因数分解:

$3^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{79}}^1\times {\mathrm{223}}^1$

素因数の和:334

約数の個数: 48

約数和(自身を含む): 37273600

約数和(自身を除く): 16186051

約数列:

[1, 3, 7, 9, 19, 21, 57, 63, 79, 133, 171, 223, 237, 399, 553, 669, 711, 1197, 1501, 1561, 1659, 2007, 4237, 4503, 4683, 4977, 10507, 12711, 13509, 14049, 17617, 29659, 31521, 38133, 52851, 88977, 94563, 123319, 158553, 266931, 334723, 369957, 1004169, 1109871, 2343061, 3012507, 7029183, 21087549]

約数ペア:

[(1, 21087549), (3, 7029183), (7, 3012507), (9, 2343061), (19, 1109871), (21, 1004169), (57, 369957), (63, 334723), (79, 266931), (133, 158553), (171, 123319), (223, 94563), (237, 88977), (399, 52851), (553, 38133), (669, 31521), (711, 29659), (1197, 17617), (1501, 14049), (1561, 13509), (1659, 12711), (2007, 10507), (4237, 4977), (4503, 4683)]