21419517

素因数分解:

$3^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{7669}}^1$

素因数の和:7705

約数の個数: 24

約数和(自身を含む): 34975200

約数和(自身を除く): 13555683

約数列:

[1, 3, 7, 19, 21, 49, 57, 133, 147, 399, 931, 2793, 7669, 23007, 53683, 145711, 161049, 375781, 437133, 1019977, 1127343, 3059931, 7139839, 21419517]

約数ペア:

[(1, 21419517), (3, 7139839), (7, 3059931), (19, 1127343), (21, 1019977), (49, 437133), (57, 375781), (133, 161049), (147, 145711), (399, 53683), (931, 23007), (2793, 7669)]