19900005

素因数分解:

$3^1\times 5^1\times {\mathrm{67}}^1\times {\mathrm{19801}}^1$

素因数の和:19876

約数の個数: 16

約数和(自身を含む): 32316864

約数和(自身を除く): 12416859

約数列:

[1, 3, 5, 15, 67, 201, 335, 1005, 19801, 59403, 99005, 297015, 1326667, 3980001, 6633335, 19900005]

約数ペア:

[(1, 19900005), (3, 6633335), (5, 3980001), (15, 1326667), (67, 297015), (201, 99005), (335, 59403), (1005, 19801)]