20992750

素因数分解:

$2^1\times 5^3\times {\mathrm{131}}^1\times {\mathrm{641}}^1$

素因数の和:789

約数の個数: 32

約数和(自身を含む): 39660192

約数和(自身を除く): 18667442

約数列:

[1, 2, 5, 10, 25, 50, 125, 131, 250, 262, 641, 655, 1282, 1310, 3205, 3275, 6410, 6550, 16025, 16375, 32050, 32750, 80125, 83971, 160250, 167942, 419855, 839710, 2099275, 4198550, 10496375, 20992750]

約数ペア:

[(1, 20992750), (2, 10496375), (5, 4198550), (10, 2099275), (25, 839710), (50, 419855), (125, 167942), (131, 160250), (250, 83971), (262, 80125), (641, 32750), (655, 32050), (1282, 16375), (1310, 16025), (3205, 6550), (3275, 6410)]