21757945

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{443}}^1$

素因数の和:525

約数の個数: 32

約数和(自身を含む): 30689280

約数和(自身を除く): 8931335

約数列:

[1, 5, 11, 19, 47, 55, 95, 209, 235, 443, 517, 893, 1045, 2215, 2585, 4465, 4873, 8417, 9823, 20821, 24365, 42085, 49115, 92587, 104105, 229031, 395599, 462935, 1145155, 1977995, 4351589, 21757945]

約数ペア:

[(1, 21757945), (5, 4351589), (11, 1977995), (19, 1145155), (47, 462935), (55, 395599), (95, 229031), (209, 104105), (235, 92587), (443, 49115), (517, 42085), (893, 24365), (1045, 20821), (2215, 9823), (2585, 8417), (4465, 4873)]