21242277

素因数分解:

$3^3\times 7^1\times {\mathrm{71}}^1\times {\mathrm{1583}}^1$

素因数の和:1670

約数の個数: 32

約数和(自身を含む): 36495360

約数和(自身を除く): 15253083

約数列:

[1, 3, 7, 9, 21, 27, 63, 71, 189, 213, 497, 639, 1491, 1583, 1917, 4473, 4749, 11081, 13419, 14247, 33243, 42741, 99729, 112393, 299187, 337179, 786751, 1011537, 2360253, 3034611, 7080759, 21242277]

約数ペア:

[(1, 21242277), (3, 7080759), (7, 3034611), (9, 2360253), (21, 1011537), (27, 786751), (63, 337179), (71, 299187), (189, 112393), (213, 99729), (497, 42741), (639, 33243), (1491, 14247), (1583, 13419), (1917, 11081), (4473, 4749)]