20637841

素因数分解:

$7^1\times {\mathrm{47}}^1\times {\mathrm{149}}^1\times {\mathrm{421}}^1$

素因数の和:624

約数の個数: 16

約数和(自身を含む): 24307200

約数和(自身を除く): 3669359

約数列:

[1, 7, 47, 149, 329, 421, 1043, 2947, 7003, 19787, 49021, 62729, 138509, 439103, 2948263, 20637841]

約数ペア:

[(1, 20637841), (7, 2948263), (47, 439103), (149, 138509), (329, 62729), (421, 49021), (1043, 19787), (2947, 7003)]