21097503

素因数分解:

$3^5\times 7^1\times {\mathrm{79}}^1\times {\mathrm{157}}^1$

素因数の和:258

約数の個数: 48

約数和(自身を含む): 36807680

約数和(自身を除く): 15710177

約数列:

[1, 3, 7, 9, 21, 27, 63, 79, 81, 157, 189, 237, 243, 471, 553, 567, 711, 1099, 1413, 1659, 1701, 2133, 3297, 4239, 4977, 6399, 9891, 12403, 12717, 14931, 19197, 29673, 37209, 38151, 44793, 86821, 89019, 111627, 134379, 260463, 267057, 334881, 781389, 1004643, 2344167, 3013929, 7032501, 21097503]

約数ペア:

[(1, 21097503), (3, 7032501), (7, 3013929), (9, 2344167), (21, 1004643), (27, 781389), (63, 334881), (79, 267057), (81, 260463), (157, 134379), (189, 111627), (237, 89019), (243, 86821), (471, 44793), (553, 38151), (567, 37209), (711, 29673), (1099, 19197), (1413, 14931), (1659, 12717), (1701, 12403), (2133, 9891), (3297, 6399), (4239, 4977)]