21215260

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{73}}^1\times {\mathrm{1321}}^1$

素因数の和:1414

約数の個数: 48

約数和(自身を含む): 49305312

約数和(自身を除く): 28090052

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 73, 110, 146, 220, 292, 365, 730, 803, 1321, 1460, 1606, 2642, 3212, 4015, 5284, 6605, 8030, 13210, 14531, 16060, 26420, 29062, 58124, 72655, 96433, 145310, 192866, 290620, 385732, 482165, 964330, 1060763, 1928660, 2121526, 4243052, 5303815, 10607630, 21215260]

約数ペア:

[(1, 21215260), (2, 10607630), (4, 5303815), (5, 4243052), (10, 2121526), (11, 1928660), (20, 1060763), (22, 964330), (44, 482165), (55, 385732), (73, 290620), (110, 192866), (146, 145310), (220, 96433), (292, 72655), (365, 58124), (730, 29062), (803, 26420), (1321, 16060), (1460, 14531), (1606, 13210), (2642, 8030), (3212, 6605), (4015, 5284)]