381980

素因数分解:

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

素因数の和:349

約数の個数: 24

約数和(自身を含む): 816480

約数和(自身を除く): 434500

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 269, 284, 355, 538, 710, 1076, 1345, 1420, 2690, 5380, 19099, 38198, 76396, 95495, 190990, 381980]

約数ペア:

[(1, 381980), (2, 190990), (4, 95495), (5, 76396), (10, 38198), (20, 19099), (71, 5380), (142, 2690), (269, 1420), (284, 1345), (355, 1076), (538, 710)]