21397705

素因数分解:

$5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{1399}}^1$

素因数の和:1453

約数の個数: 32

約数和(自身を含む): 32256000

約数和(自身を除く): 10858295

約数列:

[1, 5, 7, 19, 23, 35, 95, 115, 133, 161, 437, 665, 805, 1399, 2185, 3059, 6995, 9793, 15295, 26581, 32177, 48965, 132905, 160885, 186067, 225239, 611363, 930335, 1126195, 3056815, 4279541, 21397705]

約数ペア:

[(1, 21397705), (5, 4279541), (7, 3056815), (19, 1126195), (23, 930335), (35, 611363), (95, 225239), (115, 186067), (133, 160885), (161, 132905), (437, 48965), (665, 32177), (805, 26581), (1399, 15295), (2185, 9793), (3059, 6995)]