21621772

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{4007}}^1$

素因数の和:4101

約数の個数: 24

約数和(自身を含む): 40400640

約数和(自身を除く): 18778868

約数列:

[1, 2, 4, 19, 38, 71, 76, 142, 284, 1349, 2698, 4007, 5396, 8014, 16028, 76133, 152266, 284497, 304532, 568994, 1137988, 5405443, 10810886, 21621772]

約数ペア:

[(1, 21621772), (2, 10810886), (4, 5405443), (19, 1137988), (38, 568994), (71, 304532), (76, 284497), (142, 152266), (284, 76133), (1349, 16028), (2698, 8014), (4007, 5396)]