21090213

素因数分解:

$3^5\times {\mathrm{229}}^1\times {\mathrm{379}}^1$

素因数の和:623

約数の個数: 24

約数和(自身を含む): 31813600

約数和(自身を除く): 10723387

約数列:

[1, 3, 9, 27, 81, 229, 243, 379, 687, 1137, 2061, 3411, 6183, 10233, 18549, 30699, 55647, 86791, 92097, 260373, 781119, 2343357, 7030071, 21090213]

約数ペア:

[(1, 21090213), (3, 7030071), (9, 2343357), (27, 781119), (81, 260373), (229, 92097), (243, 86791), (379, 55647), (687, 30699), (1137, 18549), (2061, 10233), (3411, 6183)]