21609635

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{59}}^1\times {\mathrm{139}}^1$

素因数の和:251

約数の個数: 32

約数和(自身を含む): 29030400

約数和(自身を除く): 7420765

約数列:

[1, 5, 17, 31, 59, 85, 139, 155, 295, 527, 695, 1003, 1829, 2363, 2635, 4309, 5015, 8201, 9145, 11815, 21545, 31093, 41005, 73253, 139417, 155465, 254231, 366265, 697085, 1271155, 4321927, 21609635]

約数ペア:

[(1, 21609635), (5, 4321927), (17, 1271155), (31, 697085), (59, 366265), (85, 254231), (139, 155465), (155, 139417), (295, 73253), (527, 41005), (695, 31093), (1003, 21545), (1829, 11815), (2363, 9145), (2635, 8201), (4309, 5015)]