21275884

素因数分解:

$2^2\times 7^1\times {\mathrm{41}}^1\times {\mathrm{43}}^1\times {\mathrm{431}}^1$

素因数の和:526

約数の個数: 48

約数和(自身を含む): 44706816

約数和(自身を除く): 23430932

約数列:

[1, 2, 4, 7, 14, 28, 41, 43, 82, 86, 164, 172, 287, 301, 431, 574, 602, 862, 1148, 1204, 1724, 1763, 3017, 3526, 6034, 7052, 12068, 12341, 17671, 18533, 24682, 35342, 37066, 49364, 70684, 74132, 123697, 129731, 247394, 259462, 494788, 518924, 759853, 1519706, 3039412, 5318971, 10637942, 21275884]

約数ペア:

[(1, 21275884), (2, 10637942), (4, 5318971), (7, 3039412), (14, 1519706), (28, 759853), (41, 518924), (43, 494788), (82, 259462), (86, 247394), (164, 129731), (172, 123697), (287, 74132), (301, 70684), (431, 49364), (574, 37066), (602, 35342), (862, 24682), (1148, 18533), (1204, 17671), (1724, 12341), (1763, 12068), (3017, 7052), (3526, 6034)]