28357497

素因数分解:

$3^2\times 7^1\times {\mathrm{47}}^1\times {\mathrm{61}}^1\times {\mathrm{157}}^1$

素因数の和:278

約数の個数: 48

約数和(自身を含む): 48901632

約数和(自身を除く): 20544135

約数列:

[1, 3, 7, 9, 21, 47, 61, 63, 141, 157, 183, 329, 423, 427, 471, 549, 987, 1099, 1281, 1413, 2867, 2961, 3297, 3843, 7379, 8601, 9577, 9891, 20069, 22137, 25803, 28731, 51653, 60207, 66411, 67039, 86193, 154959, 180621, 201117, 450119, 464877, 603351, 1350357, 3150833, 4051071, 9452499, 28357497]

約数ペア:

[(1, 28357497), (3, 9452499), (7, 4051071), (9, 3150833), (21, 1350357), (47, 603351), (61, 464877), (63, 450119), (141, 201117), (157, 180621), (183, 154959), (329, 86193), (423, 67039), (427, 66411), (471, 60207), (549, 51653), (987, 28731), (1099, 25803), (1281, 22137), (1413, 20069), (2867, 9891), (2961, 9577), (3297, 8601), (3843, 7379)]