20360020

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{131}}^1\times {\mathrm{409}}^1$

素因数の和:568

約数の個数: 48

約数和(自身を含む): 45460800

約数和(自身を除く): 25100780

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 131, 190, 262, 380, 409, 524, 655, 818, 1310, 1636, 2045, 2489, 2620, 4090, 4978, 7771, 8180, 9956, 12445, 15542, 24890, 31084, 38855, 49780, 53579, 77710, 107158, 155420, 214316, 267895, 535790, 1018001, 1071580, 2036002, 4072004, 5090005, 10180010, 20360020]

約数ペア:

[(1, 20360020), (2, 10180010), (4, 5090005), (5, 4072004), (10, 2036002), (19, 1071580), (20, 1018001), (38, 535790), (76, 267895), (95, 214316), (131, 155420), (190, 107158), (262, 77710), (380, 53579), (409, 49780), (524, 38855), (655, 31084), (818, 24890), (1310, 15542), (1636, 12445), (2045, 9956), (2489, 8180), (2620, 7771), (4090, 4978)]