21767515

素因数分解:

$5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{197}}^1$

素因数の和:268

約数の個数: 48

約数和(自身を含む): 34128864

約数和(自身を除く): 12361349

約数列:

[1, 5, 7, 11, 35, 41, 49, 55, 77, 197, 205, 245, 287, 385, 451, 539, 985, 1379, 1435, 2009, 2167, 2255, 2695, 3157, 6895, 8077, 9653, 10045, 10835, 15169, 15785, 22099, 40385, 48265, 56539, 75845, 88847, 106183, 110495, 282695, 395773, 444235, 530915, 621929, 1978865, 3109645, 4353503, 21767515]

約数ペア:

[(1, 21767515), (5, 4353503), (7, 3109645), (11, 1978865), (35, 621929), (41, 530915), (49, 444235), (55, 395773), (77, 282695), (197, 110495), (205, 106183), (245, 88847), (287, 75845), (385, 56539), (451, 48265), (539, 40385), (985, 22099), (1379, 15785), (1435, 15169), (2009, 10835), (2167, 10045), (2255, 9653), (2695, 8077), (3157, 6895)]