21755248

素因数分解:

$2^4\times {\mathrm{43}}^1\times {\mathrm{103}}^1\times {\mathrm{307}}^1$

素因数の和:461

約数の個数: 40

約数和(自身を含む): 43691648

約数和(自身を除く): 21936400

約数列:

[1, 2, 4, 8, 16, 43, 86, 103, 172, 206, 307, 344, 412, 614, 688, 824, 1228, 1648, 2456, 4429, 4912, 8858, 13201, 17716, 26402, 31621, 35432, 52804, 63242, 70864, 105608, 126484, 211216, 252968, 505936, 1359703, 2719406, 5438812, 10877624, 21755248]

約数ペア:

[(1, 21755248), (2, 10877624), (4, 5438812), (8, 2719406), (16, 1359703), (43, 505936), (86, 252968), (103, 211216), (172, 126484), (206, 105608), (307, 70864), (344, 63242), (412, 52804), (614, 35432), (688, 31621), (824, 26402), (1228, 17716), (1648, 13201), (2456, 8858), (4429, 4912)]