21179781

素因数分解:

$3^2\times 7^1\times {\mathrm{227}}^1\times {\mathrm{1481}}^1$

素因数の和:1721

約数の個数: 24

約数和(自身を含む): 35141184

約数和(自身を除く): 13961403

約数列:

[1, 3, 7, 9, 21, 63, 227, 681, 1481, 1589, 2043, 4443, 4767, 10367, 13329, 14301, 31101, 93303, 336187, 1008561, 2353309, 3025683, 7059927, 21179781]

約数ペア:

[(1, 21179781), (3, 7059927), (7, 3025683), (9, 2353309), (21, 1008561), (63, 336187), (227, 93303), (681, 31101), (1481, 14301), (1589, 13329), (2043, 10367), (4443, 4767)]