21491679

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{151}}^1\times {\mathrm{227}}^1$

素因数の和:411

約数の個数: 32

約数和(自身を含む): 33269760

約数和(自身を除く): 11778081

約数列:

[1, 3, 11, 19, 33, 57, 151, 209, 227, 453, 627, 681, 1661, 2497, 2869, 4313, 4983, 7491, 8607, 12939, 31559, 34277, 47443, 94677, 102831, 142329, 377047, 651263, 1131141, 1953789, 7163893, 21491679]

約数ペア:

[(1, 21491679), (3, 7163893), (11, 1953789), (19, 1131141), (33, 651263), (57, 377047), (151, 142329), (209, 102831), (227, 94677), (453, 47443), (627, 34277), (681, 31559), (1661, 12939), (2497, 8607), (2869, 7491), (4313, 4983)]