20868688

素因数分解:

$2^4\times {\mathrm{19}}^2\times {\mathrm{3613}}^1$

素因数の和:3659

約数の個数: 30

約数和(自身を含む): 42684954

約数和(自身を除く): 21816266

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 152, 304, 361, 722, 1444, 2888, 3613, 5776, 7226, 14452, 28904, 57808, 68647, 137294, 274588, 549176, 1098352, 1304293, 2608586, 5217172, 10434344, 20868688]

約数ペア:

[(1, 20868688), (2, 10434344), (4, 5217172), (8, 2608586), (16, 1304293), (19, 1098352), (38, 549176), (76, 274588), (152, 137294), (304, 68647), (361, 57808), (722, 28904), (1444, 14452), (2888, 7226), (3613, 5776)]