644986

素因数分解:

$2^1\times {\mathrm{31}}^1\times {\mathrm{101}}^1\times {\mathrm{103}}^1$

素因数の和:237

約数の個数: 16

約数和(自身を含む): 1018368

約数和(自身を除く): 373382

約数列:

[1, 2, 31, 62, 101, 103, 202, 206, 3131, 3193, 6262, 6386, 10403, 20806, 322493, 644986]

約数ペア:

[(1, 644986), (2, 322493), (31, 20806), (62, 10403), (101, 6386), (103, 6262), (202, 3193), (206, 3131)]