20921061

素因数分解:

$3^1\times 7^1\times {\mathrm{53}}^1\times {\mathrm{18797}}^1$

素因数の和:18860

約数の個数: 16

約数和(自身を含む): 32482944

約数和(自身を除く): 11561883

約数列:

[1, 3, 7, 21, 53, 159, 371, 1113, 18797, 56391, 131579, 394737, 996241, 2988723, 6973687, 20921061]

約数ペア:

[(1, 20921061), (3, 6973687), (7, 2988723), (21, 996241), (53, 394737), (159, 131579), (371, 56391), (1113, 18797)]