20820855

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{257}}^1\times {\mathrm{491}}^1$

素因数の和:767

約数の個数: 32

約数和(自身を含む): 36557568

約数和(自身を除く): 15736713

約数列:

[1, 3, 5, 11, 15, 33, 55, 165, 257, 491, 771, 1285, 1473, 2455, 2827, 3855, 5401, 7365, 8481, 14135, 16203, 27005, 42405, 81015, 126187, 378561, 630935, 1388057, 1892805, 4164171, 6940285, 20820855]

約数ペア:

[(1, 20820855), (3, 6940285), (5, 4164171), (11, 1892805), (15, 1388057), (33, 630935), (55, 378561), (165, 126187), (257, 81015), (491, 42405), (771, 27005), (1285, 16203), (1473, 14135), (2455, 8481), (2827, 7365), (3855, 5401)]