21651412

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{347}}^1\times {\mathrm{821}}^1$

素因数の和:1191

約数の個数: 24

約数和(自身を含む): 40047840

約数和(自身を除く): 18396428

約数列:

[1, 2, 4, 19, 38, 76, 347, 694, 821, 1388, 1642, 3284, 6593, 13186, 15599, 26372, 31198, 62396, 284887, 569774, 1139548, 5412853, 10825706, 21651412]

約数ペア:

[(1, 21651412), (2, 10825706), (4, 5412853), (19, 1139548), (38, 569774), (76, 284887), (347, 62396), (694, 31198), (821, 26372), (1388, 15599), (1642, 13186), (3284, 6593)]