21402368

素因数分解:

$2^8\times {\mathrm{13}}^1\times {\mathrm{59}}^1\times {\mathrm{109}}^1$

素因数の和:197

約数の個数: 72

約数和(自身を含む): 47216400

約数和(自身を除く): 25814032

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 52, 59, 64, 104, 109, 118, 128, 208, 218, 236, 256, 416, 436, 472, 767, 832, 872, 944, 1417, 1534, 1664, 1744, 1888, 2834, 3068, 3328, 3488, 3776, 5668, 6136, 6431, 6976, 7552, 11336, 12272, 12862, 13952, 15104, 22672, 24544, 25724, 27904, 45344, 49088, 51448, 83603, 90688, 98176, 102896, 167206, 181376, 196352, 205792, 334412, 362752, 411584, 668824, 823168, 1337648, 1646336, 2675296, 5350592, 10701184, 21402368]

約数ペア:

[(1, 21402368), (2, 10701184), (4, 5350592), (8, 2675296), (13, 1646336), (16, 1337648), (26, 823168), (32, 668824), (52, 411584), (59, 362752), (64, 334412), (104, 205792), (109, 196352), (118, 181376), (128, 167206), (208, 102896), (218, 98176), (236, 90688), (256, 83603), (416, 51448), (436, 49088), (472, 45344), (767, 27904), (832, 25724), (872, 24544), (944, 22672), (1417, 15104), (1534, 13952), (1664, 12862), (1744, 12272), (1888, 11336), (2834, 7552), (3068, 6976), (3328, 6431), (3488, 6136), (3776, 5668)]