19800255

素因数分解:

$3^1\times 5^1\times {\mathrm{661}}^1\times {\mathrm{1997}}^1$

素因数の和:2666

約数の個数: 16

約数和(自身を含む): 31744224

約数和(自身を除く): 11943969

約数列:

[1, 3, 5, 15, 661, 1983, 1997, 3305, 5991, 9915, 9985, 29955, 1320017, 3960051, 6600085, 19800255]

約数ペア:

[(1, 19800255), (3, 6600085), (5, 3960051), (15, 1320017), (661, 29955), (1983, 9985), (1997, 9915), (3305, 5991)]