202800520

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{390001}}^1$

素因数の和:390025

約数の個数: 32

約数和(自身を含む): 491402520

約数和(自身を除く): 288602000

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 390001, 780002, 1560004, 1950005, 3120008, 3900010, 5070013, 7800020, 10140026, 15600040, 20280052, 25350065, 40560104, 50700130, 101400260, 202800520]

約数ペア:

[(1, 202800520), (2, 101400260), (4, 50700130), (5, 40560104), (8, 25350065), (10, 20280052), (13, 15600040), (20, 10140026), (26, 7800020), (40, 5070013), (52, 3900010), (65, 3120008), (104, 1950005), (130, 1560004), (260, 780002), (520, 390001)]