28625457

素因数分解:

$3^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{277}}^1$

素因数の和:350

約数の個数: 48

約数和(自身を含む): 48171840

約数和(自身を除く): 19546383

約数列:

[1, 3, 7, 19, 21, 37, 49, 57, 111, 133, 147, 259, 277, 399, 703, 777, 831, 931, 1813, 1939, 2109, 2793, 4921, 5263, 5439, 5817, 10249, 13573, 14763, 15789, 30747, 34447, 36841, 40719, 71743, 103341, 110523, 194731, 215229, 257887, 502201, 584193, 773661, 1363117, 1506603, 4089351, 9541819, 28625457]

約数ペア:

[(1, 28625457), (3, 9541819), (7, 4089351), (19, 1506603), (21, 1363117), (37, 773661), (49, 584193), (57, 502201), (111, 257887), (133, 215229), (147, 194731), (259, 110523), (277, 103341), (399, 71743), (703, 40719), (777, 36841), (831, 34447), (931, 30747), (1813, 15789), (1939, 14763), (2109, 13573), (2793, 10249), (4921, 5817), (5263, 5439)]