20871837

素因数分解:

$3^4\times 7^1\times {\mathrm{131}}^1\times {\mathrm{281}}^1$

素因数の和:431

約数の個数: 40

約数和(自身を含む): 36032832

約数和(自身を除く): 15160995

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 131, 189, 281, 393, 567, 843, 917, 1179, 1967, 2529, 2751, 3537, 5901, 7587, 8253, 10611, 17703, 22761, 24759, 36811, 53109, 74277, 110433, 159327, 257677, 331299, 773031, 993897, 2319093, 2981691, 6957279, 20871837]

約数ペア:

[(1, 20871837), (3, 6957279), (7, 2981691), (9, 2319093), (21, 993897), (27, 773031), (63, 331299), (81, 257677), (131, 159327), (189, 110433), (281, 74277), (393, 53109), (567, 36811), (843, 24759), (917, 22761), (1179, 17703), (1967, 10611), (2529, 8253), (2751, 7587), (3537, 5901)]