20813080

素因数分解:

$2^3\times 5^1\times {\mathrm{83}}^1\times {\mathrm{6269}}^1$

素因数の和:6363

約数の個数: 32

約数和(自身を含む): 47401200

約数和(自身を除く): 26588120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 83, 166, 332, 415, 664, 830, 1660, 3320, 6269, 12538, 25076, 31345, 50152, 62690, 125380, 250760, 520327, 1040654, 2081308, 2601635, 4162616, 5203270, 10406540, 20813080]

約数ペア:

[(1, 20813080), (2, 10406540), (4, 5203270), (5, 4162616), (8, 2601635), (10, 2081308), (20, 1040654), (40, 520327), (83, 250760), (166, 125380), (332, 62690), (415, 50152), (664, 31345), (830, 25076), (1660, 12538), (3320, 6269)]