20993575

素因数分解:

$5^2\times {\mathrm{19}}^1\times {\mathrm{193}}^1\times {\mathrm{229}}^1$

素因数の和:451

約数の個数: 24

約数和(自身を含む): 27664400

約数和(自身を除く): 6670825

約数列:

[1, 5, 19, 25, 95, 193, 229, 475, 965, 1145, 3667, 4351, 4825, 5725, 18335, 21755, 44197, 91675, 108775, 220985, 839743, 1104925, 4198715, 20993575]

約数ペア:

[(1, 20993575), (5, 4198715), (19, 1104925), (25, 839743), (95, 220985), (193, 108775), (229, 91675), (475, 44197), (965, 21755), (1145, 18335), (3667, 5725), (4351, 4825)]