21290752

素因数分解:

$2^8\times 7^1\times {\mathrm{109}}^2$

素因数の和:241

約数の個数: 54

約数和(自身を含む): 49019208

約数和(自身を除く): 27728456

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 32, 56, 64, 109, 112, 128, 218, 224, 256, 436, 448, 763, 872, 896, 1526, 1744, 1792, 3052, 3488, 6104, 6976, 11881, 12208, 13952, 23762, 24416, 27904, 47524, 48832, 83167, 95048, 97664, 166334, 190096, 195328, 332668, 380192, 665336, 760384, 1330672, 1520768, 2661344, 3041536, 5322688, 10645376, 21290752]

約数ペア:

[(1, 21290752), (2, 10645376), (4, 5322688), (7, 3041536), (8, 2661344), (14, 1520768), (16, 1330672), (28, 760384), (32, 665336), (56, 380192), (64, 332668), (109, 195328), (112, 190096), (128, 166334), (218, 97664), (224, 95048), (256, 83167), (436, 48832), (448, 47524), (763, 27904), (872, 24416), (896, 23762), (1526, 13952), (1744, 12208), (1792, 11881), (3052, 6976), (3488, 6104)]