19289990

素因数分解:

$2^1\times 5^1\times {\mathrm{71}}^1\times {\mathrm{101}}^1\times {\mathrm{269}}^1$

素因数の和:448

約数の個数: 32

約数和(自身を含む): 35691840

約数和(自身を除く): 16401850

約数列:

[1, 2, 5, 10, 71, 101, 142, 202, 269, 355, 505, 538, 710, 1010, 1345, 2690, 7171, 14342, 19099, 27169, 35855, 38198, 54338, 71710, 95495, 135845, 190990, 271690, 1928999, 3857998, 9644995, 19289990]

約数ペア:

[(1, 19289990), (2, 9644995), (5, 3857998), (10, 1928999), (71, 271690), (101, 190990), (142, 135845), (202, 95495), (269, 71710), (355, 54338), (505, 38198), (538, 35855), (710, 27169), (1010, 19099), (1345, 14342), (2690, 7171)]