21052778

素因数分解:

$2^1\times {\mathrm{37}}^1\times {\mathrm{71}}^1\times {\mathrm{4007}}^1$

素因数の和:4117

約数の個数: 16

約数和(自身を含む): 32897664

約数和(自身を除く): 11844886

約数列:

[1, 2, 37, 71, 74, 142, 2627, 4007, 5254, 8014, 148259, 284497, 296518, 568994, 10526389, 21052778]

約数ペア:

[(1, 21052778), (2, 10526389), (37, 568994), (71, 296518), (74, 284497), (142, 148259), (2627, 8014), (4007, 5254)]