1980010

素因数分解:

$2^1\times 5^1\times {\mathrm{389}}^1\times {\mathrm{509}}^1$

素因数の和:905

約数の個数: 16

約数和(自身を含む): 3580200

約数和(自身を除く): 1600190

約数列:

[1, 2, 5, 10, 389, 509, 778, 1018, 1945, 2545, 3890, 5090, 198001, 396002, 990005, 1980010]

約数ペア:

[(1, 1980010), (2, 990005), (5, 396002), (10, 198001), (389, 5090), (509, 3890), (778, 2545), (1018, 1945)]