21990959990

素因数分解:

$2^1\times 5^1\times {\mathrm{37}}^1\times {\mathrm{787}}^1\times {\mathrm{75521}}^1$

素因数の和:76352

約数の個数: 32

約数和(自身を含む): 40705753824

約数和(自身を除く): 18714793834

約数列:

[1, 2, 5, 10, 37, 74, 185, 370, 787, 1574, 3935, 7870, 29119, 58238, 75521, 145595, 151042, 291190, 377605, 755210, 2794277, 5588554, 13971385, 27942770, 59435027, 118870054, 297175135, 594350270, 2199095999, 4398191998, 10995479995, 21990959990]

約数ペア:

[(1, 21990959990), (2, 10995479995), (5, 4398191998), (10, 2199095999), (37, 594350270), (74, 297175135), (185, 118870054), (370, 59435027), (787, 27942770), (1574, 13971385), (3935, 5588554), (7870, 2794277), (29119, 755210), (58238, 377605), (75521, 291190), (145595, 151042)]