20807451

素因数分解:

$3^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{17383}}^1$

素因数の和:17415

約数の個数: 24

約数和(自身を含む): 36158720

約数和(自身を除く): 15351269

約数列:

[1, 3, 7, 9, 19, 21, 57, 63, 133, 171, 399, 1197, 17383, 52149, 121681, 156447, 330277, 365043, 990831, 1095129, 2311939, 2972493, 6935817, 20807451]

約数ペア:

[(1, 20807451), (3, 6935817), (7, 2972493), (9, 2311939), (19, 1095129), (21, 990831), (57, 365043), (63, 330277), (133, 156447), (171, 121681), (399, 52149), (1197, 17383)]