20820765

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{4219}}^1$

素因数の和:4281

約数の個数: 32

約数和(自身を含む): 38891520

約数和(自身を除く): 18070755

約数列:

[1, 3, 5, 7, 15, 21, 35, 47, 105, 141, 235, 329, 705, 987, 1645, 4219, 4935, 12657, 21095, 29533, 63285, 88599, 147665, 198293, 442995, 594879, 991465, 1388051, 2974395, 4164153, 6940255, 20820765]

約数ペア:

[(1, 20820765), (3, 6940255), (5, 4164153), (7, 2974395), (15, 1388051), (21, 991465), (35, 594879), (47, 442995), (105, 198293), (141, 147665), (235, 88599), (329, 63285), (705, 29533), (987, 21095), (1645, 12657), (4219, 4935)]